I have said this on the site several times before, and many others have as well - what a kid is at 12 very rarely corresponds to what the kid will be in high school.
Our 2018 was around 5'6 & 115 pounds at 12 and squarely in the middle of the pack. He's now 6'2 165 and still growing. How would a 12 year old "evaluation" correspond to what he is now as a sophomore? When he was playing Majors Little League / 50-70 / 13u travel ball, out of the 15 kids that would have ranked the "best" then, only 6 of them are still playing baseball as sophomores, and only 4 of those kids have a shot at making an impact on their varsity baseball team (whether now or next year). They were all outgrown, outplayed, focused on another sport or simply stopped wanting to play.
Not looking to dampen the OP's enthusiasm, just noting that at 12 years old it should really be all about having fun and not worrying about "measurables" or "projection".