You would have the same problem with Qt. You don't have the xdg-desktop-portal and an associated backend running. If you're going to build your own Linux system, you should be aware of why something is broken before making a complaint to the wrong people. In this case, you misconfigured your own system.

Odd how a hundred other applications have no issues whatsoever then.

This Portal is something from flatpak btw, no other terminal depends on it.

This is likely some cancer from GTK that metastasized, anything using GTK has to lock it down tight to rely on the absolute minimum of "features".

Then don't use it.

Should have used a grammar checker.