Not op. I am not a lawyer and I’ve not studied constitutional law. What I recall from high school is that anything not expressly stated as illegal is legal for citizens and any power not expressly given to a state or federal government is unavailable to them.

A law has to exist that gives states and the federal government the ability to do what they are doing and that law needs to not violate special protections built into the Bill of Rights.

With a state of emergency declared, some things can temporarily be enacted that under normal circumstances would not be legal.

I don’t know if all the lock down rules are legal, but I wouldn’t be surprised to find out that governments have overstepped their bounds.