To the extent that you still need to use standard apps, consider disabling your advertising ID. EFF has a guide to this at https://www.eff.org/deeplinks/2022/05/how-disable-ad-id-tracking-ios-and-android-and-why-you-should-do-it-now

This won’t stop google of course. You should probably also install a firewall, like other people here have suggested. And keep in mind, disabling features entirely is different from not using them. For example, if location services is turned off, then even google maps doesn’t know your location (in theory anyway), whereas if it is merely unused then google will still check periodically.

As far as I can tell, soundconverter can’t read playlists.