When I've had a credit owing to Airbnb (i.e. a payout that was received but then customer service decided to refund the guest), Airbnb doesn't issue payment, nor an email, until the debt has been paid and there is money to pay you. When I owed them $1500 as a result of Covid cancellations, I hosted 4 or 5 stays before I finally received a payout. When they issued it, it summarized all of the credits/debits.
@Albert278