There’s already a ton that they support. They just rolled out to my LG as well. Unfortunately I think they’re having issues publishing with Tizen on the official store but you can sideload it if you want. https://github.com/jellyfin/jellyfin-tizen

[Edit] they have a pretty good list of supported clients here (press the ‘all’ filter) https://jellyfin.org/downloads/clients/all

2nd this! It’s come so far in the past 2 years!