I agree, get him evaluated honestly. If he played for a legit travel program the coach will have a record of successfully placing players and will know the level at which your son would have the best shot. It feels very late for this upcoming year and with the Covid backlog I would agree with the crowd above that if he's gotten into a school that meets his educational goals and they have club great, or he can try to walk on. However, if the travel coach does say he can play D2 or D3 and the extra year helps him academically as well perhaps do a PG year. It will cost you but it's an option.
Also to be completely candid when you said your son had 90 IF velo and 90 exit velo I was very surprised. Why...Because the whole setup to his senior year almost made it seem like he was a nice utility-type/team guy but those stats if accurate are quite good. Good luck to you.