Facetime link Xperia 10 ii unable to find H.264

With IOS 15 Apple made it possible to make video calls to Android devices.
I tried it with my Xperia 10 with Opera beta android web browser and it worked like a charm!
After that i tried it with my Xpera 10 ii and the same setup. But i got the message : this device does not support H.264 encoding.
Any ideas?