If you're a fan of cloud gaming, you may want to take a little look into Netris. The developers say it's a GeForce NOW alternative, one you can self-host with it being open source. They're also keen to highlight some Stadia-like elements of it too.
awful name, there is some unrelated VNC software thing (which is vaguely similar idea of remote desktop) and the name also just sounds like a Tetris clone (because there is one called Netris)