It's to stop people setting up false listings in Ukraine so they can benefit from donated bookings from hosts and guests which were designed to support existing hosts @Svetlana235
As because of the tragic situation in Ukraine you're unable to host, what is your purpose in setting up a listing?
@Svetlana235 Airbnb allowed verified hosts who already had listings in Ukraine before the invasion to keep them active to receive donations. But I don't think it's accepting new listings there at this time.