@Gerard78 - You've just started hosting so Airbnb may hold the reservation payout for up to 30 days before releasing it.
https://www.airbnb.com/help/article/43/what-happens-if-my-guest-cancels
Make sure you understand your cancellation policy:
Moderate
Cancel up to 5 days before your trip and get a full refund. Cancel within 5 days of your trip and the first night is non-refundable, but 50% of the cost for the remaining nights will be refunded.
IF your guests cancelled before 5 days, they would be refunded by Airbnb automatically - you don't need to do anything. If they cancelled with 5 days, they would only be entitled to less than 1/2 the funds and Airbnb would provide that back to them automatically and would pay you automatically for the 1st night and 1/2 the remaining nights.