@Marc-Nicolàs0
Has Airbnb not paid you for bookings in 2021? Why?
I can't offer advice on tax law in your country or state. You should speak to a tax advisor.
But if you are referring to bookings fulfilled in 2021, then I would fully expect that income to be taxable, even if Airbnb haven't paid it yet (and you need to find out why they haven't paid it yet, before it all gets lost in the noise).
For future bookings that have yet to be fulfilled ("upcoming payouts"), I would expect to be taxed in the year/quarter that the income is realised.
This seems self explanatory, but again, I'd consult a tax advisor.