Integration to detect presence of Bluetooth device by MAC

Hi - I’m new to HA but have set up an instance of HA OS on a RPi successfully. For presence detection, I’d like a means to report if a particular bluetooth BLE device is present by MAC. I see that there are a few bluetooth integrations and tracking integrations - but it’s not clear to me exactly how this would be implemented.

If someone can point me in the right direction, tell me what integrations or threads I should be reading, that would be appreciated.