@Dimitrios-Kanellopoulos
3 things.
I tried the party that asked for permission in the first place. Revoking from their site doesn’t work. Yes that’s a mess.
Suunto support directs you to a place in the suunto app. But either suunto support doesn’t know how it works, or the place they redirect you to doesn’t work.
The party that grants permission should have a function to revoke that again. I know of no system that doesn’t provide this. (be it, google, git or anyone else). Suunto doesn’t provide this function, so it seems.
The 3rd is the most important. Of course the party that grants access should be able to revoke that access again. I don’t understand why someone would think otherwise. It’s a security and privacy risk if this function doesn’t exist. You cannot rely on the party who asks permission to give up that permission. One has only control over the party that grants the permission.