Opera 50 for Android with an ad blocker you can toggle on a per-site basis. You just have to flick a slider on or off -- you don't have to think about a whitelist or turning off ad blocking entirely.
https://www.engadget.com/2019/02/19/opera-android-ad-blocking-picture-in-picture/
https://www.engadget.com/2019/02/19/opera-android-ad-blocking-picture-in-picture/