@Molly203 The AirBNB TOS is quite clear. All cameras and their locations have to be disclosed in the listing. Their removal from the platform was to be expected once there was a complaint.
Personally, I think Airbnb was unfair since the camera was in a locked room, clearly off limits to guests. The guests had no business being in that room. But I suppose a blanket "all cameras must be disclosed" rule was applied & although not entirely logical in this case, there's no way to argue with that. How unfortunate for these hosts!