Is it possible to disable all app permissions?

All app permissions by default are ON so wanted to ask is there a way to disable them all at once instead of having to go through them one by one?

You would need to run a script as Administrator, which recursively updates all the registry keys under "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CapabilityAccessManager\ConsentStore".

This PowerShell script changes the App permissions below each listed category, to either Allow or Deny.