Most Hosts take mice seriously.That's why my rules include the fact that all food should be covered. I have a 120-year old house, and when the weather cools off, they have been known to come in. Usually it's one or two - if they come at all. I set traps, bait, and even use heat treatment. I also ask permission to come in and check the traps. And yes, I have cats. The smell of cats alone is a deterrent.
Usually it takes about a month of vigilance before they hibernate (the mice, that is.)
Living in an apartment or condo is no guarantee. In a previous life, one of my cats nailed some on the 10th floor!
if an Airbnb guest of mine enountered a mouse, I would ask him or her what they would want to do - relocate, or allow me to continue setting traps and inspecting them. I would offer to refund them for the day affected.