Ok guys, so about priorities on Dongle + BT.
Bluetooth there are various modes. One for calls, one for other audio.
On Playstation our decision is to prirotize BT for call connections, then the dongle, THEN other BT audio.
This means you will have the Playstation audio be prioritized over standard BT audio, so if you want to listen to your phone and say watch Youtube, you either have to disconnect the dongle, or turn off the Playstation. We can't make everyone happy, and we believe playstation audio to be more important than someone wanting to watch a youtube video/listen to their BT music while their Playstation is on.
So again, BT + dongle hierarchy:
BT calls
PS5 dongle audio
other BT audio
As for Aux, Dongle, BT: Aux/USB wired and can be played at the same time. If an Aux cable is connected, it is supposed to disconnect the dongle. That is the intended behavior. Easily found by plugging in the dongle to a PC, and then connecting the aux cable. You will see the dongle connection disappear from the sound settings.