Hi,
Did you log out from your Nextcloud instance and access the user details then?
I’m still on NC21 and not 100% sure that there has not changed something regarding the user details, but I assume, that these details are only visible for logged in users.
In the personal profile settings users can share the details they want to share with other NC users and can even configure with whom the details are shared (local, federated servers, public). Default is “local”.
In companies who fill these details by default via an external service, sharing this information locally on the NC instance shouldn’t be an issue, because this information can be gathered within the company anyways, I guess.
For me personally this behavior is not an issue for me. (Since you asked).