No more disconnection possible?!

I see some who can no longer connect to the server… I have the opposite problem:
My old client (3.0.3) no longer works on ubuntu 22.04 update.
The following versions no longer have a logout menu!.. So I don’t know how to interrupt my connection when I’m away, my synchronized encrypted partition unmounted. Should I let someone sync my data somewhere else when I’m not there?
Has this very useful possibility disappeared from the new versions or is it obtained in another way… Or should I really give up the ability to synchronize my data locally and settle for a webdav connection so that the security of my data Nextcloud is not based on the security of my workstation?.. :frowning:
Please, help me!.. :wink: