How about banking apps? In my part of Europe a growing number of banks require installing an app via Google or Apple story. The Android ones are known to use sdks that at full of "telemetry". Cash is no longer an alternative.
Can you not use a browser to access banking services? If not, you should vehemently complain and/or move to another bank. And while cash is better for privacy, you can always use a credit card instead of your phone.
If nothing else works, my suggestion would then be to buy a cheap Android phone just for that indispensable banking app. Just leave it home in a drawer powered off when not in use, and use your a degoogled phone for your daily business.
