Show all installed apps from the app catalog for a SharePoint site. The script just provides a simple output of the AppTile class. The script needs the PowerShell PnP extensions installed.

GetInstalledApps.ps1

param (
    [string]$Url,
    $Credentials
)

if ($Credentials -eq $null)
{
    $Credentials = Get-Credential
}

Connect-PnPOnline -Url $Url -Credentials $Credentials

$web = Get-PnPWeb -Includes AppTiles

$appTiles = $web.AppTiles
Invoke-PnPQuery

foreach ($appTile in $appTiles)
{
    $appTitle = $appTile.AppTitle
    $appType = $appTile.AppType
    $appStatus = $appTile.AppStatus
    $appSource = $appTile.AppSource
    $isCorporateCatalogSite = $appTile.IsCorporateCatalogSite

    if ($appType -eq "Instance")
    {
        $appTile
    }
}