Have you updated its firmware? Looks like there’s a new update available as of September 2023, which I haven’t installed yet but I’ve installed a couple before this one.
I haven't. I'm in the "if it ain't broke, don't fix it" camp for TVs. But you've also piqued my interest. I'm curious how much of an improvment it offers, and what features it may or may not have removed.
Not quite LineageOS for TVs but it’s something.
https://www.sony.com/electronics/support/lcd-tvs-android-xf9...