But XMPP is dead, so I don’t use such apps anymore. I also haven’t been using Gnome for a very long time now. I’ve read somewhere that they removed this feature though.
It's very possible your social circle is not on XMPP though. There's some light at the end of the tunnel with the EU's Digital Markets Act forcing the large messaging providers to provide interoperability - at a minimum this should enable better bridges between XMPP-based and proprietary systems.
The active GTK clients these days are Dino and Gajim. Pidgin is still around, but has fallen very far behind with regards to features (they're in the middle of a rewrite that will hopefully address this).
Also, multi-monitor setups with different DPIs are not possible on X.
I see so many screencast/input-sharing/macro apps on github that have been in a holding pattern--for years!--waiting on wayland to either fix a bug or add a feature. 14 years of wayland so far, and we still can't do things that every other major OS's display server handles easily. At this rate, wayland will certainly become exploit-free, since no one will be using it.
The whole mess feels like corporate sabotage.