You probably haven't heard or seen Domani Jackson much this season when watching Alabama football. That's not because he hasn't been out there; it's because he's keeping his side of the field so locked down that quarterbacks aren't even trying to throw the ball over there.
It's never a bad thing when you don't hear a cornerback's name called. That tends to mean they are doing their job. And Jackson is certainly doing his job.
He's doing it so well, in fact, that according to PFF's data, he hasn't allowed a reception in 55 coverage snaps:
Alabama Cornerback Domani Jackson This Season:
ud83dudc18 55 Coverage Snaps
ud83dudc18 Zero Catches Allowed@AlabamaFTBL pic.