and while its not the same, page 270 of the 2022 BIAB manual says you can correct audio notes to the correct notes in the key of the song - doing automatically what melodyne does but without the same level of control.

so whereas the helicon plug in will follow a midi melody, i think if your pitch is badly off the BIAB process may correct your vocal to the 'wrong' in key note

give it a go - you may have a hit song if you can produce a demo!