That's a slight misunderstanding. The piano track is for emulating the piano part. A song you are playing the piano part to might not have a piano part. Secondly you might not be emulating it. Chord voicings are IMO like a springboard for improvisations rather than a concrete wrten part. For a learner piano player, progressing from intermediate to advanced, one needs to go from voicing in stadard closed voicings, to voicing in spread voicings, to enhanced voicings using 9/11/13ths then to altered chords b9#9#4#5's.

I just(rather obviously) solved the problem with transposing the chord names. Simply use numerals e.g. for a C9 chord you might voice, 1 5 b7 3 5. If your chord is transposed, the same numbers apply. In other words don't use letters for note names.

Using the improved method, it's possible to practice advanced voicings of any chord and simply transpose. This is a mission critical part of advanced improvisation on the piano (and feasibly other instruments). I think some kind of custom feature similar to the "section text"

Above I suggested the chord voices could be selectable - from basic to more advanced. A pop up similar to the chord builder, but with a voicings option and perhaps an image of a piano keyboard is what I envision.

Such a functionality would be exactly what an intermediate piano improviser needs in in order to become advanced

Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k