If I were you, I would just use Piped (piped.kavin.rocks). It stores all your subscriptions in Local Storage, and displays them in the “Feeds” section. The Feeds section also supports RSS, so you can get notified too. If you are on android, grab one of the Piped clients. NewPipe is the most recommended, but I really like the UI of LibreTube.
I agree. I myself use GrapheneOS. However, seeing that OP despises Pixels so much, I figured these would be the next best options.