i want to confirm if my wiring is correct before i hook up the switch. i want to make fan and light independent. fixture has blue, black, white green. switch is double pole dual switch from leviton. the power feed, white neutral goes from power side straight to fixture side via wire nut. the fixture blue goes to top of gold screw of light switch the fixture black goes to bottom gold screw the power feed black goes to one of the black screw and i leave the tab in tact. green ground is to ground. is this the correct way to wire a combo exhaust fan light to be used independently?

I have a newly installed 200 amp outside breaker panel. It is my understanding that this panel is the single bonding point for neutral and ground. So, in this panel I have a #4 bare copper wire that comes up from the grounding rods and is then bonded to neutral with a lug. I have four wires running from this outside panel into my basement to the (sub panel) for my whole home. An insulated #6 ground wire is attached to the case of the outside panel and then comes into the main panel grounding buss bar. There is a separate isolated neutral buss bar, as there should be. The problem is that I don't see how the case of the 200 amp outdoor panel is securely grounded in the first place. The neutral lugs are isolated and the outdoor breaker did not come with any bonding screws or similar. Should I simply move the insulated ground cable running to the sub-panel over to the other neutral lug... or is it ok as it is? The attached image is of the outdoor 200 amp breaker. Any ideas are certainly appreciated. Thank you!