In the server version of Confluence, any user can edit its starting page via Profile/settings.

Now in our cloud application I can only set an general starting page and cannot find out how to change the setting per user. Not as admin, not as logged in user, not as logged in user, when set to site admin.
We use this cloud confluence as an external WiKi for our costumers and I do not want them to share the same starting page and get an overview over pages they do not have access to..
Is this functionality not available or am I not able to find it. There is no easy-to-find hint in the documentation.
Thx for any help.
Kind regards
Volker