Home Assistant Add-on: rtl_433 with MQTT auto discovery

Dear all, I’m now having my doorbell basically up and running using correct filter settings, but I still would be glad to represent it properly in HA. To my understanding, an MQTT Event would be the right device type. I struggle in getting it implemented, see here.

Would you let me know how your rtl_433 doorbells are included in HA? Was someone successful in using the MQTT Event? I currently use a MQTT Binary Sensor which is working by a reset after every ringing, but not really the way it should be done.