@Lily670
Airbnb's AI bots perform flagging for potential party risks. This usually happens if you are under 21yrs old, booking a short stay or one night stay (usually a weekend), and is over a holiday or for spring break. It could also mean you live in the area where you are trying to book the Airbnb,
Unfortunately, only Airbnb can "unflag" your profile, so you would need to work with them on that.