well yeah thats how gnome shell will enhance their background apps section in the corner menu. Currently all you can do is summon the application from the background into focus. This implementation will hopefully replace the need for https://extensions.gnome.org/extension/615/appindicator-support/

It just works with portals, tho

However, yes, it’s pretty much systray. What I don’t understand is why don’t show icons on the top bar