Thank you for the guide
Under ‘A sensor detects something’, only the motion sensor is available. The options ‘Detects people’ and ‘Recognised person’ are not available. As far as I know, the option ‘Specific motion is detected’ → ‘People are detected’ is only available for notifications, not for automations.
I don’t think that’s correct. There are 8 GB and 32 GB versions. I haven’t seen a version without internal memory yet. The 8GB version is also available in the official Aqara Shop.