Thanks so much for alerting me! I tested this for several of the pig tokens and see that cnft.io will display tokens if they only have the CIP-25 metadata for tokens (tag 721). If they additionally have other metadata such as CIP-20 message metadata (tag 674), then they aren’t displayed. The 721 metadata in the minting transaction is correct in all four cases I examined, but just the two tokens with only 721 display in cnft.io, even though all four display in pool.pm/tokens.
I just posted an issue on their github repository and pointed out that tokens with 721 metadata should be displayed regardless of any other metadata that might have been in the minting transaction.