@Deanna169 Airbnb's security deposit is purely symbolic. They do not actually collect it, and whether you have a so-called security deposit or not any damage claim that the guest disputes will be arbitrated by Airbnb. If you watch this forum you will see many, many posts from hosts whose claims Airbnb denied, seemingly completely arbitrarily. So you really cannot count on Airbnb to make you whole in the event of damage. You must carry your own STR insurance (e.g. Proper or Foremost), and you should not make anything available to guests that it would kill you to lose.
Do carefully review the claims procedure.
You cannot go back to guests who have already booked and ask them for any kind of fee that was not disclosed before they booked.
How to set up your listing and vet guests to avoid problem scenarios is a topic of frequent discussion on this forum.
https://www.airbnb.com/help/article/264/what-do-i-do-if-my-guest-breaks-something-in-my-place