We often get the requirement from Business to check specific User access of Model Driven Apps. Business wants to know a specific user has access to how many model driven apps.
Also, If you would like to troubleshoot Model Driven App permissions access this post will help you.
Power platform provided us with this capability to check the Model Driven Apps access specific to a User by providing the User Email Address. Now lets dig further to know how to check App Access.
Navigate to https://admin.powerplatform.microsoft.com/ -> Select Environment for which you would like to check App access
Click On Enviornment-> Click on See all users as highlighted below
Now click on app access check link as highlighted below
You will be navigate to CDS Web resource and you need to provide User Email Address then click on Search button. It will list dow list of Apps the User has Access and additional details.
Hope this quick tip helps!
xrm CRM Dynamics 
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