Use the for long time available patch for GTK file chooser, use an XDG portal to open KDE file chooser instead of the GTK one, or use a Qt-based (KDE or Deepin) rather a GTK-based environment. And for any interested programmers, a maintainer recently has outlined some steps[0] to introduce that functionality in a way that probably GNOME devs will accept.
[0]: https://gitlab.gnome.org/GNOME/gtk/-/issues/233#note_1106706