Thanks for the reply.
No, I was using the older versions from Google Play Store.
Anyhow, I updated to the versions from github and it is still not working :-(
This is what ANT Tester App shows;
Unfortunately, I did not check with ANT Tester and do not have a screen shot of that with the previous Android 8.x SW, where ANT+ was working fine.
Anyhow, "Built-in firmware: No" and "ANT HAL service: Not found" are worrying to me.
Is this an indication that the new radio firmware that has been most likely installed with the Android 9 update did not include firmware support for ANT?
Any suggestions how to get this sorted out?
In meanwhile I also tried factory reset, but that just resetted all user data, Android 9 stayed active and ANT not working.