Rooted TV can't install certain store apps, what are my options?
As you can see in the screenshot I'm on a bit older TV and firmware. When I want to install the Amazon Prime Video app for example the LG store tells me I will need to update firmware first. This isn't an issue with some other store apps at least and those install fine. I've been running the LG update blocker from the homebrew store before but that completely blocked the ability to install any store app so I'm not using that anymore (for now at least).
Now from what I've seen, there's no option to sideload LG store apps. And I guess in this case it wouldn't work either as I guess the app demands a minimum firmware version. Also saw no way to update the firmware while keeping the TV rooted.
So what are my options here? Is there a way to update firmware or sideload apps that I'm not aware of? Or do I have no choice than go without certain apps?