A small example of how to generate a report for a Gradle Project's dependencies as per - https://ed-george.github.io/articles/12-02-2020/versioning

app-build.gradle

// APP Level app/build.gradle

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

apply from: '../dependency-update.gradle'

android {
    compileSdkVersion build_versions.compile_sdk

    compileOptions {
        sourceCompatibility build_versions.java
        targetCompatibility build_versions.java
    }

    defaultConfig {
        applicationId "com.example"

        minSdkVersion build_versions.min_sdk
        targetSdkVersion build_versions.target_sdk

        versionCode app.versionCode as int
        versionName app.versionName as String
    }
}

dependencies {
    // Groups relevant to module here
    kotlin()
    androidx()
    network()
}

build.gradle

// Top-level gradle file

buildscript {

    apply from: 'versions.gradle'
    addRepos(repositories)

    dependencies {
        classpath plugin.kotlin
        classpath plugin.gradle
        classpath plugin.gradle_update_version
    }

}

allprojects {
    addRepos(repositories)
    repositories {
        dependencies { apply from: "$rootProject.rootDir/versions-groups.gradle" }
    }
}

dependency-update.gradle

import groovy.xml.MarkupBuilder

apply plugin: 'com.github.ben-manes.versions'

def gitSha() {
    return 'git rev-parse --short HEAD'.execute([], rootDir).text.trim()
}

dependencyUpdates {
    outputFormatter = { result ->
        def updatable = result.outdated.dependencies
        if (!updatable.isEmpty()) {
            def filepath = "deps/${project.name}-dependencies-result.html"
            def file = new File(filepath)
            if (!file.getParentFile().exists()) {
                file.getParentFile().mkdirs()
            }
            def fileWriter = new FileWriter(file)
            def html = new MarkupBuilder(fileWriter)

            html.html {
                head {
                    style("table{width:100%}table,td,th{border:1px solid #231a4f;border-collapse:collapse}td,th{padding:15px;text-align:left}table tr:nth-child(even){background-color:#f4f9fb}table tr:nth-child(odd){background-color:#d6e5e9}table th{background-color:#231a4f;color:#f4f9fb}")
                }
                body {
                    h3("Module: " + project.name)
                    h3("Git commit: " + gitSha())
                    h4("Last updated: " + LocalDateTime.now())
                    table {
                        tr {
                            th("Group")
                            th("Module")
                            th("Current version")
                            th("Latest version")
                        }
                        updatable.each { dependency ->
                            tr {
                                td(dependency.group)
                                td(dependency.name)
                                td(dependency.version)
                                td(dependency.available.release ?: dependency.available.milestone)
                            }
                        }
                    }
                }
            }
            println "[DEPS] Written file: ${filepath}"
        }
    }
}

versions-groups.gradle

def Group(Closure closure) {
    closure.delegate = dependencies
    return closure
}


ext {

    kotlin = Group {
        implementation deps.core.kotlin_stdlib
    }

    androidx = Group {
        implementation deps.androidx.appcompat
        implementation deps.androidx.ktx_core
        implementation deps.androidx.ktx_fragment
    }

    network = Group {
        implementation deps.network.retrofit_core
        implementation deps.network.retrofit_converter_gson
        implementation deps.network.log_interceptor
        implementation deps.network.glide_core
        kapt deps.network.glide_compiler
    }
    
}

versions.gradle

ext.deps = [:]

// Top level KVPs
def versions = [:]
def deps = [:]

// def means we're making a local variable.
// We'll use this map to build our deps key/value pairs below

// Kotlin Version
versions.kotlin = '1.3.50'

// ######################################################################################
// # Build Versions
// ######################################################################################

// Android related dependencies
def build_versions = [:]
build_versions.min_sdk = 23
build_versions.target_sdk = 29
build_versions.compile_sdk = 29
build_versions.java = JavaVersion.VERSION_1_8
ext.build_versions = build_versions

// ######################################################################################
// # Plugins
// ######################################################################################

def plugins_version = [:]
plugins_version.kotlin_plugin = versions.kotlin
plugins_version.android_gradle_plugin = '3.5.3'
plugins_version.gradle_update_version = '0.21.0'
versions.plugins = plugins_version

def plugins = [:]
plugins.kotlin = "org.jetbrains.kotlin:kotlin-gradle-plugin:$versions.plugins.kotlin_plugin"
plugins.gradle = "com.android.tools.build:gradle:$versions.plugins.android_gradle_plugin"
plugins.gradle_update_version = "com.github.ben-manes:gradle-versions-plugin:$versions.plugins.gradle_update_version"
ext.plugin = plugins

// ######################################################################################
// # Dependencies
// ######################################################################################

// CORE

def core_deps = [:]
core_deps.kotlin_stdlib = "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$versions.kotlin"
deps.core = core_deps

// ANDROIDX

def androidx_version = [:]
androidx_version.appcompat = '1.1.0'
androidx_version.ktx_core = '1.2.0-rc01'
androidx_version.ktx_fragment = '1.2.0-rc02'
versions.androidx = androidx_version

def androidx_deps = [:]
androidx_deps.appcompat = "androidx.appcompat:appcompat:$versions.androidx.appcompat"
androidx_deps.ktx_core = "androidx.core:core-ktx:$versions.androidx.ktx_core"
androidx_deps.ktx_fragment = "androidx.fragment:fragment-ktx:$versions.androidx.ktx_fragment"
deps.androidx = androidx_deps

// NETWORKING

def network_version = [:]
network_version.retrofit = '2.6.2'
network_version.glide = '4.9.0'
network_version.okhttp = '3.14.2'
versions.network = network_version

def network_deps = [:]
network_deps.retrofit_core = "com.squareup.retrofit2:retrofit:$versions.network.retrofit"
network_deps.retrofit_converter_gson = "com.squareup.retrofit2:converter-gson:$versions.network.retrofit"
network_deps.log_interceptor = "com.squareup.okhttp3:logging-interceptor:$versions.network.okhttp"
network_deps.glide_core = "com.github.bumptech.glide:glide:$versions.network.glide"
network_deps.glide_compiler = "com.github.bumptech.glide:compiler:$versions.network.glide"
deps.network = network_deps

// Add your dependencies here...

// ######################################################################################
// # Add Repo Method
// ######################################################################################

static def addRepos(RepositoryHandler handler) {
    handler.google()
    handler.jcenter()
    handler.maven { url 'https://plugins.gradle.org/m2/' }
}

ext.addRepos = this.&addRepos

// Create global level dependencies
ext.deps = deps