We are below 100, so no. I don't see anyway that happens legally or logistically. You have to be complete unmitigated idiot to even propose such a rule particularly when businesses are struggling to find employees. It defies logic.
Legally, they have a twin problem:
-Does OSHA have that statutory authority to enact such a rule, and does Biden have the authority via executive order to have OSHA do so. It's complicated (and not as easy as the R governor make it seem) but Chevron has been on its last legs for a while.
-Does this exceed the scope of the powers of the federal government under the Constitution and does that power displace that of the states (some of whom have banned such mandates).
It's this last question which is the more troubling of the two. It sets up a state sovereignty clash which the red states are not likely to let go of. It's the whole ball of wax when it comes to their view of limited v. unlimited government.