Mask and other mandates from the Spanish flu era were relinquished once they were no longer needed. Interestingly, paranoia about such things was as common (and wrong) back then at it is now.

I can only talk for my own country but politicians seem to have been really careful to either couple the laws to an state of emergency which is justified by the pandemic situation or do laws which have a certain due date and need to be renewed by Parlament every 6 monthish.

Unlike national security against an invisible threat the absence of CoViD can be shown in which case government even if showing the behaviour you suggest can be more easily pressured into doing the right thing.