I do not believe any sharks are suitable in a 200G. Minimum is usually 8' 300G shallow but that's pushing it for the smallest sharks with minimal rock.
I had a small bamboo shark in my old 300G and i felt like he outgrew it in no time and rehomed him. this was 20+ years ago though.
6ft Round would probably be better.
Tank is to small. I’ve kept bamboos and rays in the past. Had them in a 240 and outgrew it quicker than you’d think and had to move them to my pond I had at the time. You could grow some out but know it won’t be a forever home