I am not saying he could have Giannis levels of difference, but I am sure he will get a bit more buff, just a bit. That's why I believe that we should be waiting for 2023-2024 season to start and he will look a lot more different and be a lot better.
With basketball as your profession, anyone could buff themselves up whenever they want it. Because they all have the focus to enhance themselves in every possible way unlike when you're still in college. These kids work hard to reach this far. Now, what they'll gonna do is to work harder than before as they just entered the league of the best basketball players in the world. So, yeah everyone is expecting for Chet to enhance his physical appearance and make it more solid.
This kid got potential as he has the skills of a guard and he still have a lot time in the NBA and a lot of time to improve. So, this 1 season he'll miss won't mean anything as long as he continue working regardless of the injury.