Yeah but that's common across all headsets, including AirPods. As soon as the microphone is enabled, it falls back from high-quality AAC to the ages old SBC profile.
If there's one thing I can't understand about modern wireless voice comms, it's this. We can push megabits per second of pixels, with low latency, over wireless with miracast, but can't figure out how to push 16-20 kHz of 8-bit audio signal full duplex? It makes zero sense.