GriffinUcos wroteEars of Tin wroteI'm using the new rAudio
https://github.com/rern/rAudio-1 and Bluetooth working great in both directions. Previously with Re6 I could only send phone>pi. Sometimes it helps to regenerate the list of bluetooth devices with the search icon in Networks setting page and select device from that list.
Edited to add I have RPi3 and RPi4 both with onboard BT. No dongles.
Thanks EoT. No response to the search icon so pretty sure it's the use of a BT dongle that isn't catered for. No worries I'll leave it for now.
Have a great New Year everyone.
Edited because the lower case h was annoying me.

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Not sure what I was doing wrong before!!
rAudio 20210105
Enabled Bluetooth on Systems .
Turned on BT Speaker.
System paired and connected!
Sadly any attempt by me to modify
mpd.conf audio output or asound.conf to use BT breaks the system, so I lose my DAC and fifo appears on it's own in audio output. That leave me nothing in /settings.php?p=mpd.
I'll get there eventually.
Phill