Might not be news to most of you, but I recently discovered personalDNSfilter (https://f-droid.org/pt_BR/packages/dnsfilter.android/), and I'm installing it on any phones I find in front of me.
This app is very lightweight, doesn't require root, and by default, blocks ads and trackers via dns lists. It can also be used for using custom dns servers, including DoH and DoT or to block other things via custom lists. It's simple and easy to use, while also allowing power users to do a lot more