How to implement NFC / RFID Card Reader

Hi all,

Right now I am working on a Software that does provide different “Hardware” with sensors entities to HomeAssistant.
It is working by sending Information to an MQTT Broker so that the auto-discovery from HomeAssistant does recognize the devices, sensors and states.

This Hardware Platform does also provide Card Readers for NFC and RFID - which I would somehow implement into HomeAssistant… but I wonder, how this does work?

The Cardreader itself shouldn’t be a Device with a Sensor - and where the sensors state does contain the scanned tag information.

The best option would be, if I could implement it in the same way as the NFC Reader on the Mobile phone companion app is working…

Is there some information available how a card reader could be implemented?
Or how the scanned tag should be sent to HomeAssistant?

Does HomeAssistant supports external readers at all?