@Chiara774 "File a complaint"? Of the billions of people who have been affected by this crisis globally, how on earth did you get the idea that your situation is somehow special or worthy of anyone else's time? But here it goes anyway..
Fact: Airbnb does not transfer your money to the host until after the scheduled check-in date. If that has not yet occurred, the host does not have your money - Airbnb does. There's nothing to gain from bugging your host about it.
Fact: There is such a thing as trip cancellation insurance with "Cancel for any reason" (CFAR) coverage. You could have bought this if you believed that you were entitled to refunds when circumstances change - as they always do for millions of people every day, even when not in a time of pandemic.
Fact: The time window eligible for full-refund cancellations is posted here: https://www.airbnb.com/help/article/2701/extenuating-circumstances-policy-and-the-coronavirus-covid1... . If you're not eligible, that's because your booking is over 2 weeks away. That means you have time to wait until the window extends to the scheduled date of your trip.
Until then, you can rest at ease knowing that the money out of your hands for the time being is only the budget you'd dedicated to your trip - one way or other, you weren't going to keep it. Meanwhile, during the shutdown of travel, your host is likely to lose several months of expected income which their family may be dependent upon. Try to have a little perspective; it's not all about you.