Just a fair warning, if you already use the LiveTV option with a TV Tuner or IPTV, I have yet to find a way to get them blended together with the fake TV channels in the guide on Plex even with xTeve outputting a valid m3u/xmltv. It’s either one or the other unfortunately.
Emby did work correctly so I’m assuming it’ll also work correctly in Jellyfin too.