Not on steam deck but I play it on Linux pc and ps5. One of the coolest things about it is cross save, you can save your game on pc or ps5 then continue from that same spot on the other platform.
I connect my LG because jellyfin works great on the built on web browser. I can also run it on a firestick or chromecast but I like the interface provided by the browser.
if you go to settings->user interface->menu you should have 3 other options if you don’t like xmb: glui, ozone, and rgui show up as options to use instead of xmb on android phone version, and linux desktop versions.