yeah we need wait phhtreble to patch this bugs, this bug is not releated to android 12, i tried android 9 gsi pure from aosp and there is also no audio in calls too, but in phhtreble everything is fineNo Bluetooth, no NFC, no Volte and no audio in callls are known issues with Android 13 beta GSIs.
A fix for Volte is posted in this thread, it requires root tho.