Great work rate for a kid that hasn't played a whole lot at the position.
I reckon if he spent all of next year in ISC and working as the fullback through the pre-season he'd probably dominate the competition and be primed to take over the Broncos fullback role from 2023 onwards.
As has been mentioned by the ISC folks on here, he's largely just a runner of the ball at the moment and he's probably just feeling his way into the role, but I think if you hand him the responsibilities next year he'd start to realise where he's most effective and when to chime in, and you could see him really start to dominate and become a focal point of their attack.
Once he knows what he's doing at fullback and starts to wear that responsibility as the focal point of the team's attack, that's when I'd want to see him in first grade.
I think he could also quite easily take a center or wing spot in first grade as well, but does that help his fullback game??
This is where it's on the coaching staff and R&R to correctly identify the best role for him and how to develop him correctly... and it's these kinds of decisions that we need to be absolutely perfect on if we are going to get out of the current mess.