Not sure if it'd work on Netflix but my wife were pleasantly surprised to A&E and History apps on our apple tv suddenly forgetting how to do ads after I set up adguard home with a few extra filter lists...I did have to ok a few things the list blocked. But the apps work and seem to be adless, at least for now.
Yeah I regrettably* bought a year's subscription to Peacock and was also pleasantly surprised that my PiHole just blocked all the ads.
*This was when they were offering a year for 20 USD. They had advertised world cup streaming but neglected to mention that all the commentary was in Spanish with no English option. I ended up just streaming a Swiss TV channel because it was at least in a language I can understand.
You could just ditch all those apps and get Stremio with a Real-Debrid subscription. You can stream any content from any provider for ~$3/mo (including Netflix, A&E, History, Disney+, HBO Max, Prime Video, etc.) As-free, of course.
Basically R-D works by downloading torrents to a dedicated server, so you can stream them instantly using a Netflix-like interface on your TV/tablet/PC/phone (via Stremio). And since they're direct downloads, you don't have to wait for seeds, nor do you need a VPN. It's like having a seedbox except anyone can add any torrent to it (and not just videos, but literally any torrent can be downloaded instantly).
Sorry if this reads like an ad, but I really want more people to know about this. There's a better way than paying for a bunch of streaming services, or waiting hours for people to seed. Or signing up for a private tracker and having to constantly worry about keeping your seeding ratio up.