He turned 20 years old his last year in high school and then spend 5 years in college. Because of Covid we are seeing a lot of older rookies coming into the league because of the 5th year many of them decided to remain in college.I think one reason he fell is he's a 25 year old rookie.
It is weird that he is older than Austin Jackson who has been in the league for 4 years already and just a year younger than Tua.