61.129 (a)(3)(v), can it be with multiple instructors? My question is can the 3 hours in prep for the check ride be done with different instructors, or does it have to be all 3 hours with the same instructor? Thanks.
There’s no requirement per se that multiple instructors cannot do this.  However, the CFI giving you the logbook endorsement to take the practical will probably want to log that time with you for liability reasons.