I personally just pointed Coreelec to my NFS share… I tried Jellyfin for Kodi and Jellycon and they are quite unstable (at least a few months ago). If I pause a video, and the restart, it was guaranteed to exit the stream after a couple of minutes. Sometimes, it would not sync properly, so if I finished an episode, it was not guaranteed that the day after it’s marked as “Watched”. On the other hand, Coreelec + NFS works flawlessly.

I just set up keepalived with a virtual IP. Nebula sync syncs them once a day. Dead simple and has been working for ages.