How can I nickname and color-code cards in Apple Wallet on iPhone?

I know this has been asked before, and people have come up with workarounds, but just in case it’s been addressed… how can you nickname or colour-code cards in your wallet? I have multiple cards with the same bank, and can’t easily tell which is which. Android lets you nickname and change their display colour, I’m surprised if Apple doesn’t.

[Re-Titled by Moderator]