Don't confuse state-level requirements with how people actually behave on the ground. For instance, FL has no state mask mandate but nearly every county has or had some requirement:
Beyond the veil: What mask requirements are in place in Florida?
The real challenge for epidemiologists post-Covid will be figuring out what behaviors actually affected the spread, and I'll bet state mandates end up being pretty far down the list.
I live in a county with no mask mandate. Gov. De Santis recently vacated all county and municipal fines for people for non-compliance. Rarest wife and I don’t patronize businesses that require masks. Super simple stuff.