I’m also guessing the state won’t have much ability to enforce their orders if the national emergency has been rescinded. That is where they get their ability to do this, yes?
No. The state authority comes from their own inherent policing powers. Humanity has fought outbreaks for a long time and the emergency powers of the state to take these actions has always been there. On the other hand, the federal government only has those powers that are delegated to it, and there is some doubt whether it has the authority to impose a national lockdown if it wanted to.