The bug impacting the Calendar view on the Airbnb iOS app has been resolved. To resume viewing your Calendar in the Airbnb iOS app, please update to the latest version of the app (24.39).
There are many posts on the subject here and I've lost count of the number of times I've replied to hosts to delete and reinstall the new Airbnb app on the phone but as a host myself, it's impossible to do more.