Unfortunately the Smart TV hacking community is not that active.

It is a bit more active than your links seem to indicate, but is not very well organized or easy to find.

Use https://cani.rootmy.tv/ to check recent status of rooting LG TVs models. Many slightly older, 2+ years old TVs are still rootable, due to this exploit from 2024: https://github.com/throwaway96/dejavuln-autoroot

Or just get a perfectly normal, average salary, like this single parent with 2 children the wallstreetjournal posted about in that same year: