I don't know about VJ but Jetstar Pac hired about 8 with no time on type, just the rating. CAAV had no issues.
Must be a mix up, Vietjet only take people with time on type, to get past CAAV with no time on type is a real problem and only certain trto's are approved. 500 hours on type is the minimum requirement. There was p2f for people with zero hours, but it seems to have dried up. I think now they are only willing to look at people with 500 hours or more on type.