I’ve been struggling to find a solution for the last 30m. I tried the following

  • Install gnome-settings-daemon
  • Install xdg-desktop-portal-gnome

I already have the kde and gtk portals installed (it comes by default). I am using OpenSuse Tumbleweed. Those apps are running under flatpak

EDIT: It was a bug in XDG Portals and it was fixed