Check out this link
https://www.gamespot.com/articles/how-to-play-fortnite-on-steam-deck/1100-6503402/
Looks like you can stream it from the Xbox service for free via edge, and you can install a flapak version of edge, if your distro can do flapaks
I just did a quick Google, I haven’t actually tried this so good luck! But it sounds like streaming it is the only way given the form of anti cheat used. Don’t think you can do it natively
I ran an Apple TV in the living room for a long time to access my Plex server and whatever subscription my wife has this month. As time went on it got more and more glitchy until it came to the point where I had to power cycle the thing every few days. Replaced it with a cheap fire stick, annoyed the crap out of me. Replaced that with a cheap Roku, it was only slightly better than the shitty firestick.
My wife got me the NVIDIA shield pro for Christmas this year, and I picked up the p2920 controller for it. My god this thing is awesome - not only is it the best tv box I’ve ever used, I can use moonlight to play games on my rig or GeForce now to stream games. I highly recommend this thing