I have done the same, prtsc and then paste it into a paint, as I needed to show more properties calendar at the same time.
It is clumsy and difficult - I share hosting with my sister and we need to coordinate work as properties are in a different location (1.5h away)
Under Reservations (quite hard to locate) there is a multi calendar - it could serve the purpose, but you cannot chose a month, it goes week by week, but shows more than a week on a screen, so when printed loks messy, impossible to get a month on a single page.
It is quite strange, but the same thing is with Booking.com - they dont have printing calendar option.
In meantime I managed to synchonise Google calendar, but sometimes it does not get updated for days, but at least I can print multiple calendars simultaniously and have it on one sheet of paper and add thing manually.
PS
Regarding a feedback to AirBnB, just recently I was sent a brief survey that had only Q's with yes or no (and scale) but had no option to add any text, so I could not provide any real feedback.