“Do you want to allow this app to make changes to your device?”

Hello Ysera_Dreamer,

The 'Do you want to allow this app to make changes to your device?' prompt is basically the User Account Control prompt. You can read all about it in this documentation:

https://docs.microsoft.com/en-us/windows/security/identity-protection/user-account-control/how-user-account-control-works?WT.mc_id=WD-MVP-5000693

The answer to your questions:

1) IMO, there is no such list to access. All the third-party apps (except Microsoft Store apps) you may have installed should have been granted via UAC prompt.

2) This specifically depends upon the app you are granting access to.

3) May or may not be possible, again depends upon the app.

Regards.