Hello @MuhammadAnwaarUlHaqIslam,
I will suggest you the following steps to further move ahead using PowerShell
- Connect-Azure AD : Connect-AzureAD
- Enter Get-AzureADServicePrincipal to display all registered Enterprise Applications along with their ObjectId
- Remove-AzureADServicePrincipal -objectid <ObjectId from above> to remove all listed application
Please mark as "Accept the answer" if the above steps helps you. Others with similar issues can also follow the solution as per your suggestion
Regards,
Manu