Is there a way to UNmerge merged tracks in GarageBand?

Hi theAudiœnce,

It sounds like you're wanting to split part of a merged track. If that's correct, check out this resource.

Split regions in GarageBand on Mac

This should help.

Cheers.

You would get more response in the GarageBand for iOS forum. I’ll ask the hosts to move your post there.