in chord track its possible to create scales on different places on the timeline,and on the audio track in the chords section on the inspector use “scales” on the “follow chord track” box.analyze the audio in vari-audio and the notes should be follow according to the scales.
(set to scales again in the inspector if the notes didt move to the scales or if vari audio was reseted )
but i do agree that integrated scale option in vari audio would be more simple and straightforward approach