If you're definition of "adjusting" a play is Cam running instead of throwing, then yes, he does that well. It's just the wrong definition.
Just watch him get his ass have to him all year in 2020 because he didn't roll line protection to effectively manage the blitz. I'm also struggling to remember one time Cam shifted out of one play into another last year. Granted I didn't get to watch every game like I normally do in a season. But he wasn't exactly asjusting the actual play call at the line, would love to see some examples where Cam shifted from up on the line to shotgun and send the RB out wide with success