It's a "yes" for me on leaving masks. I provide one disposable mask per guest per stay.
I'm considered an essential worker, and buy disposable masks for myself anyway, for when I do office calls. I have a travel kit of mask, sanitizer and disinfecting wipes.
I have a detailed Covid info sheet in my space with the latest local information. I also leave a small dispenser of sanitizer, and a container of disinfecting wipes, along with the masks.
Most of my guests have been taking the masks, which could mean they arrived unprepared, or their home locations don't have the same regulations we do in Chicago, or they just like the freebie.
For me, leaving masks adds to the message that I take Covid seriously, and ask guests to do the same.