You can try PowerShell to get all the necessary details like below:
Display a list of all PowerApps
Get-AdminPowerApp
Returns a list of all PowerApps across the tenant, with details of each (e.g., application name (guid), display name, creator, etc).
Display the number of apps each user owns
Get-AdminPowerApp | Select –ExpandProperty Owner | Select –ExpandProperty displayname | Group
Display the number of apps in each environment
Get-AdminPowerApp | Select -ExpandProperty EnvironmentName | Group | %{ New-Object -TypeName PSObject -Property @{ DisplayName = (Get-AdminPowerAppEnvironment -EnvironmentName $_.Name | Select -ExpandProperty displayName); Count = $_.Count } }
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