The ERC20PermitPermissionedMint.sol contract heredit from an OpenZeppelin contract who is still a draft and is not considered ready for mainnet use. OpenZeppelin contracts may be considered draft contracts if they have not received adequate security auditing or are liable to change with future development.
Ensure the development team is aware of the risks of using a draft contract or consider waiting until the contract is finalised.
Otherwise, make sure that development team are aware of the risks of using a draft OpenZeppelin contract and accept the risk-benefit trade-off.
Also could evaluate changing to the solmate contracts since his ERC20 implementation already has the EIP-2612 permit
