NFT ERC721 tokens display and sending support was developed in the WordPress Ethereum Wallet plugin under the early access sponsorship program conditions. It becomes available for all of the PRO license owners for free from the 26th of May 2021.
You do not need to buy this extension anymore. It is merged in the WordPress Ethereum Wallet plugin already!
Show NFTs of the current user account:
[ethereum-wallet-nft columns="3" rows="2"]
Show NFTs of a specific account:
[ethereum-wallet-nft columns="3" rows="2" account="0x6975be450864c02b4613023c2152ee0743572325"]
Make sure to configure the etherescan.io API Key for this functionality to work.
Demo – Ethereum Wallet for NFT Extension
Use the WordPress Ethereum Wallet plugin. It has all NFT features builtin already.