Tracker Control is an app that basically acts a DNS based blocker. Recognizes what your apps connect to, groups it into necessary and unnecessary domains and so on. It does set up a local VPN though, so you can’t use it alongside an actual VPN.
The Duckduckgo app does pretty much the same thing, no need to explain more.
There’s more that do the same DNS-based blocking, Netguard being another popular one.
Another option would be to have a blocker running network-wide, a pihole for example. But again, won’t do anything in case you’re using a VPN, obviously.
And then some apps will straight up refuse to run if you block their trackers. If this happens, it should be the last straw when deciding whether to actually keep the app or not.