Thanks Noel,
I posted a more detailed update but a) yes I'm outputting WAV not midi from BIAB and b) my MIDI tracks in DAW (cubase12) are set to quarter note = 80 in tempo track and signature set to 6/8.

In BIAB I tried setting using a 6/8 style and setting to 2 beats per measure, and set tempo to either 53 or 55 (dotted equivalent of 80 quarter)

Didn't line up audio to the midi.

Appreciate your post!