Exactly.. Even the card that I used tap and pay with on Google Wallet, doesn't work on Android Pay.
You are partially correct here. If your card was in your Google wallet, it should have been allowed to move over to Android Pay even if it is not a supported Bank. I had my BB&T card on Google Wallet, and it ported over to Android Pay and I can use it just like before. It is just not in the system as that bank card. It creates a generic card in Android Pay.