I’m certain there are mice in our garage, as there are in most garages. They are probably in there right, a team of them using a dust bunny to play a soccer game! Nevertheless, I cannot imagine ever calling any landlord about a mice “problem” in a garage.
Also, in our current home we have previously had flies problem, and ant problem.
We solved those issues ourselves. We don’t have time to screw around waiting for landlord. It is quicker to solve issues ourselves.
Now if there was a termite problem, yes we would direct landlord to solve that.
You have to pick your battles carefully. Otherwise you just become nuisance to landlord.