I think this is possible, sort of.

Export JUST the piano part as a .wav and/or save as mp3.

Go to Fadr. Sign up for a free account.

https://fadr.com/

Upload stem to FADR and have FADR read the stem.

Export the midi.

Open the midi in a DAW and use a piano VST from a good library.

Edit, quantize, fiddle with it.

There ya go.