MetaMask is capable of holding, sending, and minting NFTs. There are some minor differences between MetaMask Mobile and Extension when interacting with NFTs. On MetaMask Mobile, you can see your NFTs in-app, while on the extension you cannot see them natively. You can use 3rd party websites to view those NFTs, such as Etherscan, Opensea, or Rarible.
The NFT space if evolving rapidly, so we recommend using community forums and support articles from trusted 3rd party sites.
OpenSea
Rarible