Since my previous post on this topic got auto-closed I’m posting this new one.
Reading the release notes of /e/OS version 3.6-a14 I got triggered to try getting Roon Arc going again, and this time it works!
What triggered me is this part “App Lounge
- You can now sign in with your microG account directly from App Lounge, no need to configure it separately. This will help with third party app compatibility for apps using Play Integrity.”
No need to log in with a google-account. It seems to be working fine with App Lounge logged in as “anonymous”.
Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online services
