@Elizabeth2327 and @Andreas-and-Anna0 this may help:
https://www.airbnb.com/help/article/1869/assistance-animals
This is the only thing that ABB will accept to deny assistance animals, so if it applies to you please be sure to update your listing.
Health or safety concerns
If your listing includes a shared space and an assistance animal would create a health or safety hazard to you or others (EX: allergies or potential issues with other animals), you don’t have to host the guests with the assistance animal. Please share this information on your listing to avoid any potential disappointment and be clear and polite when communicating with guests about this.