Is it a union or an angled part? Please show a selection box, and also, please a screenshot while selecting the FrontSurface on the conveyor part. (The yellow outline should be on the surface that is facing the direction you want the part to go)
Updated the post with the selection box, it is a union of 3 parts (3 angled diamond plates). Also the conveyor is going in the correct direction because when the player stands on it goes up the conveyor.
replace with 3 parts and apply velocity each in the direction they’re facing (you can see the selectionbox of the union is aligned with the middle part, making the lower section not aligned with the lookvector velocity)