I can't speak for all law enforcement (no clue whatsoever for outside of the U.S.) but around these parts, the use of force continuum is the law of the land for how law enforcement is to justify their actions and respond to a threat. Generally speaking, law enforcement is able to respond to the threat with the next level of force necessary to address the threat. By way of example, if somebody is being physically combative or resisting verbal orders, the officer may at their discretion use a non-lethal method such, baton, or TASER device. If Baton can also be used as lethal though, as there are color-coded strike zones that dictate the fashion in which the weapon is being used (i.e. a hit to the head or neck are RED zones and are considered the use of deadly force).
Here's a good, brief reference article from the NIJ:
https://www.nij.gov/topics/law-enforcement/officer-safety/use-of-force/Pages/continuum.aspx