This has already been covered on the forums already: Can`t install snap - #6 by iwalker in relation to snap a thread that started for Rocky 10 which is dependent on snap packages from EPEL which is the problem. But since Rocky 9 also relies on snap packages from EPEL, then the problem is the same.
Also covered here: Rocky 9.7, Rocky 10.1 and EPEL so until Rocky 9.7 is released, you just have to wait. It’s due soon.
Please search the forums first before posting thx 
Assuming that snap isn’t the problem from EPEL, and some other dependencies for MySQL Workbench, then you will need to post more detailed information into what exactly the problem is - like what dependencies cannot be installed?