Not all NFTs will be visible automatically in your metamask wallet, but you can add some of them manually. Please follow the instructions in this Article
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NFT tokens in your MetaMask walletI hope you are using the metamask mobile as the metamask browser extension NFT support is still being worked on
In MetaMask Extension
Please note that while you can add NFTs as custom tokens in the extension, you will not be able to see them natively in the UI.
We are actively working on improving NFT support in MetaMask Extension; it will be available soon, and this information will be updated when it becomes available. For the time being, to manage your NFTs via MetaMask, please use MetaMask Mobile.