Good for you, that’s great.
But have you tried TrackerControl ? It can restrict internet from apps, and block trackers.
I heavily recommend it, since you can also monitor and block system apps .
DDG App Tracking Protection isnt as effective, but it is extremely easy to use and breakage is minimal.
As for the DDG browser, I only use it when the website I am visiting doesnt work on firefox.
Ah, it makes sense, ddg browser uses builtin webview, of course it is lighter.
You can keep using DDG app protection, but you can reduce the battery usage of tracker control by going into settings and disabling “find new trackers”
This option finds and shows you the trackers each app has, disabling it will stop finding the trackers but will continue to block them.
All the best with that.