Network blocking like PiHole can block it, but on Android, I also use Blokada, which traps and logs outbound requests to domains on the block list. I also sometimes use ClassyShark3xodus to scan apks for trackers.
https://f-droid.org/en/packages/com.oF2pks.classyshark3xodus...
For on-phone use, so you can grab cellular data, Charles:
https://www.charlesproxy.com/documentation/ios/