Why doesn't nfcpy see the NDEF section?

Question

NFC

I'm just learning NFC. I have one project with nfc cards. At 99%, it is already ready, I use nfcpy. Reader - ACR122U. I did the whole project using some kind of no-name card, and then I took mifare cards (classic 1k and ultralight). Nfcpy returns None in tag.ndef. I read that these cards support NDEF and are generally NFCForum-compatible. What am I doing wrong? The area is very unfamiliar, it is unclear exactly where to look for information and what to do.