Year in year out my son's ex-HS coach places less players in college than any other program in the league including the lower tier teams. Other than one case where we heard that he kept a letter from a D1 school from a player (that is a rumor, not a known fact) he does send info to college coaches when requested. Our experience however is that there was always an element of CYA in the responses. He'd say good things but there'd always be some qualification to go along with the good things.
I think that what the coach said at one pre-season parents meeting explained it. He said that he got a form from mid-major type D1 that asked the standard "is he the best player in the league" etc., type of questions. He said he certainly couldn't say that about the player. The player, may or may not have been the best player in the league that season. It is an incredibly talent rich league. The player was a freshman all-american the next season.
Further, he tried to route another player, the one whose letter from a D1 he allegedly held onto to a NAIA school where he felt the player was more suited to than the D1 level. The player was a Sunday starter at a D1 part way through his freshman season.
Unfortunately, not every coach is that good at helping players get into college even if they are trying. On the other hand some of the less successful on the field coaches from our league do a great job of helping kids get college scholarships. I believe the 7th place team in the league had 3 or 4 kids sign D1 this season.
Lots of words but the bottom line is go ahead and have the coach make his recommendations and make the best of the situation.