Openzeppelin defender for mintng

i want to know if i made a contract with minting with EOA and relayer now i grantrole for minting to relayer now i changed my EOA . will relayer able to mint nft?

is their any way to mint nft . as someone come and mint nft and fees for that minting nft will be deducted from relayer instead of customer .

i want basically gasless transcation for user . any source code available?