Yes, I deleted the because it showed the panel’s IMEI under the QR Code sticker in the back.
The IQ Card legacy radio is designed to go in the EXT1 slot, as shown in the installation how-to: How to Install the IQ Card Legacy Radio into the IQ Panel 5
If the card is in the other slot, the panel can still show it in the daughter card test, but it won’t fully read it. That’s why the restore couldn’t add the legacy sensors.