Limit login to specific app

Is your feature request related to a problem? Please describe.

I have a YT Music Premium subscription and want to use it in the official YT Music app. Unfortunately this app forces users to login and I have to due to the subscription anyway.

BUT YT Music is the very only service I really want to use from Google. The rest I want to avoid as much as possible and - at least have them not see my account.

The problem is currently when I sign in to YT Music I'm also automatically signed in to other Google apps.
I really do not like that Google Maps, knowing my location, is now linked to my Google Account as this is a huge let down for privacy.

So I immediately removed the account again. But now I can't use YT Music.

Describe the solution you'd like

Please add a per-app login or some kind of whitelist to only make the account available to specific apps and hide it from others.

Describe alternatives you've considered

idk

Additional context

There is a setting "Trust Google for app permissions" but it doesn't seem to fully work. For example I'm still automatically signed in to Maps and Photos. Just some account specific things are not working but they show the account as signed-in and see my account name / email. This is not good.

No files, tests, or entry points are mentioned. Start by tracing how account sign-in is exposed to installed apps and review the existing “Trust Google for app permissions” setting. Done means an account can be made available to YT Music while remaining hidden from other selected apps.