I setup Plasma Big Screen recently. Added Moonfin, a Jellyfin client that actually works properly with a tv style USB remote. Steam Link runs on Linux just fine, so just add it. Favorite those apps in Big Screen, and you are set. Do the same for any other apps you want. Works with TV remote, game controller, mouse keyboard. Anything you need really.
I setup Plasma Big Screen recently. Added Moonfin, a Jellyfin client that actually works properly with a tv style USB remote. Steam Link runs on Linux just fine, so just add it. Favorite those apps in Big Screen, and you are set. Do the same for any other apps you want. Works with TV remote, game controller, mouse keyboard. Anything you need really.