There are several NFT release standards. Just the best known is ERC-721. This is the release standard used in the Ethereum blockchain. But it is not the only one. There is already a more modern standard - ERC-1155. It has expanded asset options, making it possible to add both NFT and interchangeable token into a single contract. According to information from
https://coinpedia.org/guest-post/what-do-i-need-to-know-about-non-interchangeable-tokens-nft/ the ERC-988 standard was introduced in 2018. It is possible to combine different assets into one combination. Confirms ownership of ERC-20, ERC-721 tokens.