Software not using Dolphin open/save file picker
From Pengwings
This seems to work for some programs (some flatpaks but not all)
sudo vim /etc/environment
GTK_USE_PORTAL=1 GTK_DEBUG=portals XDG_CURRENT_DESKTOP=KDE
For other programs layering them with rpm-ostree works (e.g. libreoffice). This doesn't work with every program either (e.g. audacity and filezilla still display gtk file dialog even when installing the rpm)