"Talk to me Goose." LOVE IT! My first purchased movie video - and our (long expired) cat's name! (Dating myself a bit, here.)
Anyway, a few things.
First, the Ivies do recruit later than most D1 programs, so if he hasn't got specific interest yet, there is little to be learned from any perceived lack of attention. The primary reason is that a 10th grader (and obviously a 9th grader) probably doesn't have the solid academic resume which is the prerequisite to getting an offer. That means that Ivy recruiters are just building "follow" lists while other D1s are extending early (and meaningless) offers. Making it into the following bucket is huge - can't get an offer unless you are in the bucket in the first place. (One lesson here: get that needed test score early; same with the AP classes and test scores. A coach can look at the curriculum as early as end of 10th grade and have a good feel for the coach's ability to get the player through admissions.)
Second, if proball is the dream, a player sacrifices nothing to attend an Ivy. Every player in the country (actually, in the world) - regardless of division - who has a potential MLB tool will be found and signed. An entire multi-billion dollar industry is built upon ferreting out talent and no one goes unfound. The Ivies have deep connections in baseball (think Texas Rangers, for example, with Venable and Young; Frawley with the Twins. The Ivy list is endless; there is no anti-Ivy bias (except in drafting and signing HS Ivy committed players.))
Third, no one heads to the portal from an Ivy until they have graduated. (I'm not familiar with the portal and the Patriot league). The degree is simply too valuable; the step down in career opportunites is too great to leave without the piece of sheepskin. Contrast that with the portal scramble for players from other leagues - it seems like "what happens if proball isn't a realistic chance" is now an after thought. (Both my kids graduated from the same school, so I have a feel for career trajectories and it's pretty impressive. [Both Mom and Dad are state school grads, and we marvel at the difference.])
Fourth, there are no differences in summer collegiate ball opportunites between, let's say, an LSU player and a Dartmouth player - all other things being equal (i.e., playing quality). (My son - now remember this was a long time ago - played Northwoods and the Cape - and also interned for a summer in NYC with MLB working in economics.)
So, what can he do now? Get the best PC you can afford and with whom he can bond and love. Velo is king; work and focus on that. Find a trainer (same standards) - velo builds with strength and flexibility. Accept nothing less than max effort from academics (tutors if needed - same as the above baseball skill development). Learn where the Ivy coaches will be during the summer and get there; write them to find out, if necessary. If possible, visit some campuses to see if he likes them - each school has a different feel/personality.
D3s will still be there later.
You can PM me - though I'm not really tech literate and sometimes can't figure out how to reply.