Do u have installed gnome-keyring or kwallet and running it on the system? Also from know cases,nm-applet should installed and executed. bbs.archlinux.org/viewtopic.php?id=246698
I am using both for enough long time,mutlidevice synchronization it’s nightmare in xmpp,also usual xmpp isplaintext.So when u wanna use encryptions like omemo so far not always guaranteed that ur encryption key will be delivered to ur new device which u connected.Also u cannot control sessions.So if u would be hacked u would not be notified,and u don’t have ability to kick out this dude session.But yes xmpp more light about resources and works faster for now.
Depends from application,some apps like whatsapp or viber will tell that they wanna google play service but u can skip this pop up and keep using application but some apps like official chatgpt app will not work at all.
Their official is very annoying,they use google service for DRM purpose and also if u have root it will not work either.As alternative u can try chagpt wrapper f-droid.org/uk/…/org.woheller69.gptassist/