It's almost certain that nearly all workplaces are doing nearly nothing in regards to COVID precautions. (After all, (because of the nature of stock investment market) COVID precautions don't generate shareholder value, and certainly have negative ROI for their parent-company's/owner's/whatever real estate investment portfolio.)
The variance will be due to a mixture of each individual's level of acceptable risk, and how clued-in they are about their local COVID situation, and COVID more generally.