Please explain why the traveler from Star Trek TNG calls Westley Crusher heir musak (SP) ?

I think that was the Traveller’s way of saying that he knew something about Wesley that he couldn’t reveal without causing a temporal paradox

No idea but I know he was suppose to be a future time traveler, which never happened as far as I know.

He does become a Traveler! This is revealed in the final season
of Star Trek:Picard.

Ah, you are right, but I feel like they still skipped a lot in that plot. Leaving it vague. He’s a traveler and then later an officer again and then a traveler that must be reborn to be a traveler in the future. Like Jean Luke married his mom at one time and was later portrayed in the future as never being married because he had mommy issues. I say this because supposedly, they had a child and she just simply left the ship when she found out she was pregnant and they do not mention a divorce. She just moved on and they were just friends in the more recent story when he finds out he has a son.

^^Leaves the door open, right?