I wanted to know if you had any NFC cards available. If so, how would I be able to set it up with the QR code I’ve already set up?

You may use the Short URL available on your page to use in the NFC card.

Send the short URL, e.g., https://linko.page/ YOUR-PAGE-ID (replace YOUR-PAGE-ID with the actual Page ID) to the NFC card provider to embed in the NFC card. Everything else will work as is.