No FCS QBs in the ratings, but your point is valid that Turner was rated below many FBS QBs and backups. Don't get me wrong, in the portal era, you try to upgrade every position every year including QB. So, if Pyne wants to come to UConn, you take him just like you would take any college QB that has demonstrated decent performance. That said, Turner was a true freshman QB that was was missing most of his offensive weapons due to injuries.
Compare Zion's true freshman year with Dan Orlovsky's true freshman year:
Dan O: 10 games, 128 for 269, 47.6%, 1379 yards, 5.1 yards per attempt, 9 TDs, 11 Int., rating: 93.5
Zion Turner: 12 games, 140/231, 60.6%, 1245 yards, 5.4 yards per attempt, 9 TDs, 7 Int., rating: 112.7
And Zion played a tougher schedule than Dan O.