So does this disqualify Momo as being Joy Boy as he was already born at that time? Or it could be that there is some age restriction on who can be Joy Boy so Oden didn't think of Joy Boy? Many possibilities but yeah, a lot can result in Destinypiece, yes.
the timeline of when that joyboy comment was made
and momo's age doesnt line up
so yes
it cant be him. its luffy.