Add a custom simple sidebar to a page, CPT archive, singular post, etc.

custom-simple-sidebar.php

<?php
// Hooks to remove default sidebar and add our custom one

// Place me in functions.php or above genesis(); on a page template (in which case, no conditional is needed)

add_action('get_header','example_change_genesis_sidebar');
function example_change_genesis_sidebar() {
    
    // change the conditional to determine where the swap occurs
    // https://codex.wordpress.org/Conditional_Tags
    
    // is_home()                      // blog (or "posts") page
    // is_singular('post')            // all single posts
    // is_singular('page')            // all single pages
    // get_post_type() == 'my-cpt'    // all custom post type pages (single and archive)
    // is_post_type_archive('my-cpt') // Post type archive for 'my-cpt'
    
    if ( is_singular('post') ) { // conditional to change
        remove_action( 'genesis_sidebar', 'genesis_do_sidebar' ); //remove the default genesis sidebar
        remove_action( 'genesis_sidebar', 'ss_do_sidebar' ); // remove the 'simple sidebars' sidebar if present
        add_action( 'genesis_sidebar', 'example_do_sidebar' ); //add an action hook to call the function for the custom sidebar
    }
}

//Function to output the custom sidebar
function example_do_sidebar() {
	dynamic_sidebar( 'my-custom-sidebar-id' ); // ID of sidebar created in Simple Sidebars or added via genesis_register_sidebar();
}

Thank you! I will give this code a shot but it looks like it's exactly what I need :)

This code adds the custom sidebar but it doesnt remove the primary sidebar, which appears below the new sidebar