Is it permissible to benefit from government support for a sports project, which is based on paying 70% of the amount, with the state donating the remaining 30%, knowing that the increase is usury?

If the state recovers a portion of the support amount (70%) and waives a portion of it (30%), then this transaction is not a pure loan but rather combines a benevolent loan (Qard Hasan) and a gift (Hibah). The recovered portion is considered a benevolent loan, and the unrecovered portion is considered a gift. This transaction is valid and has no suspicion of usury (Riba), because Riba involves an increase for the lender, whereas here the beneficiary of the waiver is the borrower.