It's my birthday soon and I will get an oculus Quest 2 as a present, which I have to share with my brother.
Can I somehow set up an account with a password, as well as with Netflix, so that my brother does not e.g. Can access my saved games or my YouTube account?
No.
In the end, the quest is set up via the Oculus app on the mobile phone, which connects from the account to the Facebook account
You would have to reset them for a new user
So it is not recommended
If you have to let your brother play with your scores.
Anyway, I see sharing here as critical
Because only one account will run
Pity…
I would like to slightly adjust my answer.
In Quest 2 there's the possibility to link a second account in the developer options.
The first user is admin and the other user gets all the games he has
But not the other way around