Are you a veteran by chance? If you ever served in the military and we’re honorably (and sometimes even generally) dischanged, you qualify for $0 down payment.
All active, reserve, and veterans qualify for a VA letter (as long as you served honorably). This letter is a promise from the VA that you will make the payments. It’s not a loan however. You will still need to get a loan through a lender but a down payment is not required.