You can also set your DNS in settings to an adblocking DNS such as Mullvad, that works really well for me. Rethink is also for for more precise control.
Mullvad link to their dns servers: https://mullvad.net/en/help/dns-over-https-and-dns-over-tls
Not sure why Netflix wouldn’t be on the Aurora store. Anyway, I did use android TV on an OdroidXU4 for a few months. It worked well with an air mouse and made it work like a regular android TV. Only issue I had with it sometimes was getting it to wake up after being asleep for some time, but that issue could have been ROM+odroid (or air mouse) specific.
I know you are looking for new but I know in my ThinkPad T480 the wireless card can be easily removed. It’s not that old, 2018. Still runs modern Linux wonderfully…and is well supported. It would be more than enough to do what you wanted. EBay is a good place to find them.