"This project was born out of accidentally changing the area option to EU in the EZ-Adjust service menu on a US TV. The factorymanager binary enforces a region lock (geolock) that prevents reverting the area code — even through the same EZ-Adjust menu that was used to change it"

Sounds like service mode shenanigans. I'm curious though - does switching the TV to EU even do anything 'better' privacy-wise or anything, or do you just get trapped in that 'region' for services?

Maybe ask in the openlgtv discord if you want to know more about this sort of thing