There is no official support for LG TVs running WebOS 5 or older (which is pretty much any one made before like 2021 or 2022, mine is from 2018), you can add in one if you root the TV, but even in that case it's just a wrapper for the web UI. When Plex forced me to drop them (I had just moved everything to Hetzner), I lost a few users as well since they didn't have clients available for their older TVs. Of course this can easily be remedied by using a streaming stick/STB but the problem still exists.