I was happy to use the AirPro 4 with Google Pixel 8a for Auracast. I could access Auracast broadcasts via both the Earfun App and Qualcomm Auracast App. This has worked for both public and encrypted broadcasts.
I got an Firmwareupdate to Version 0.3.7. Now I doesn't work anymore. When I press "Start Using Aurcast" in the Earfun app, I immediately receive the message "Connection failed, please re-enter" and the app returns to the start screen. Similar issue with Qualcom app: When I select the Earfun AirPro4 under devices, "Connecting" appears for a second, then "Disconnected / Try again" appears.
I deactivated LE Audio and activated it again, without improvement.
I have connected a different set of AirPro 4 (still with Firmware 0.3.5) to the same smartphone and app version. Then Aurascast is working.
So it is very clear that the newer firmware of the earbuds causes the issue.
Are you aware of the issue?