My son is 15 and a High School Sophmore he was just evualated by his travel team and had a Bat exit Speed of 88 MPH. He is a power hitter and big 6/1" 200#. Is this something that they take seriously at showcases?
IT's a measurable that will get attention. BUT, when they look at video they'll examine his fundamentals. Big kid, keep developing skill and improving athleticism. Next test his how his swing holds up in a game against advanced pitching.
For perspective: son has teammate (2018) who just hit 93 exit velo; impressive. But zero approach at the plate, he lacks consistency of getting the ball in play with a good hard hit, he's always swinging for the fences.
Keep on working and having fun.