works for me both on my archlinux machine and my steamdeck with steam and non-steam games. I’ve even played NFSU2 with it =] . I don’t think it required any more configuration than just pairing for me, no special drivers or tools. Maybe it needs a firmware update (I don’t know if that’s a thing, just a thought)?
The really hilarious thing to me is that the NextPush app (unified push provider that can be run on your nextcloud server) is unsupported by nextcloud talk. But it is supported by a bunch of other competing applications.