Yeah, I have a Sony X800H, and I foolishly installed an update early in 2021 that added irremovable ads to the home screen.

I haven't figured out how to roll the firmware back, but I have blocked basically all of the domains it accesses with pihole, and after a cache clear, it only displays default messages imploring the user to check out youtube and other google products. It's inoffensive enough that I haven't continued exerting effort to quash them.