I am so sorry that happened to you and your home. What you described would be my worst nightmare. As I am sure you already have, photos, photos and more photos. Also get statements or actual physical quotes for fixing things so you can present those to Airbnb in your claim. Also, if you have any before pictures of specific items damaged, or proof of value, submit those as well. Unfortunately airbnb will not always cover the more valuable items such as artwork (Which you mentioned) so if you do not ready I highly recommend homeowners insurance.
In my experience with airbnb support, it has been hit or miss, sometimes they seem over the top helpful and sometimes they are a bit dismissive. Be persistent and stay on top of them. Also, has the guest had anything to say thus far, or have you tried contacting them?
Here is the portion from their Host Guarantee on covering booking loss.
“Booking Income Loss” is the loss of booking income from the booked portion of a Covered Accommodation (according to bona fide Airbnb confirmed bookings, contracts or agreements in force prior to the established time of loss) by you, as a Host, resulting from a Covered Loss. Booking Income Loss does not include non-continuing charges and expenses or any loss of booking income during any period in which the Covered Accommodation would not have been tenantable for any reason other than a Covered Loss. The Booking Income Loss will be measured starting from the time of occurrence of the Covered Loss and ending when the Covered Accommodation can be made ready for habitation under the same or equivalent physical and operating conditions that existed prior to the damage."
Hope things work out for you
