This video shows you how to check which apps have access to your data and. How to set app authorisation & revocation? Don't revoke authorization for system apps updater and software updates though.
However, there is an option to revoke authorization for some of the system apps to stop them from collecting any data and delete any related data stored in their servers. Settings>> password & security>> authorisation & revocation. Uninstall it or disable the app.
Every time i enter the app is asking to confirm the privacy to use online content. Most of them are some of the most essential apps for ur phone to work. If you wanna disable even some of it, you should google its importance first and then. Whenever i try to revoke authorization in my phone i get the error couldn't revoke authorization.
I have tried both signed in and signed out of. First debloat all the unnecessary apps, then revoke authorization for the ones that remain.