.bchdomains are not NFT, unless the domain registrar itself supports NFT. If you want to turn all subdomains which you own, you have to create a registrar
registerfunction which calls
registry.setSubnodeOwnerthen mint the token making the subdomain label hash as tokenId
SubdomainRegistrarwhich allows you to turn your subdomain into NFT without any coding.
.tokenURI. However, we created a separate metadata service which NFT marketplaces like OpenSea can fetch metadata for LNS such as registration data, expiration date, name length, etc. For more detail, please refer to the metadata documentation site.