I would like to request the option of using a gtk file-chooser that uses portals, like GtkFileChooserNative, unlike the current FileChooserDialog (from what i understand)

See Flatpak: Portal support in GTK

This would help to make the app more integrated with either QT or GTK Environments

PS: it would be great to also have a option to not use a custom GtkHeaderbar so it can be styled by the environment