I have 2 LG OLED TVs, different sizes. Rootmytv failed to root both of them. I forgot which step and which error it was giving, but I tried everything including factory reset etc. I'm glad it's working for some people.
I mean, I didn't wanted to buy a brand new one anyway, it's very expensive and I don't need latest AI features. I found a year old model with firmware that was listed as supported by the jailbreak at the time