Shelly PM Mini power meter entities not showing

I have added a Sheely PM Mini (gen2) smart power meter behind a socket. I can access it in the Shelly mobile app and added it to my wifi network fine.

HA discovers the device and I can add it via the Shelly integration. I get entities for Reboot and Beta Firmware Update (plus a few diagnostic entities) but there are no entities for the power or voltage, which I can see in the Shelly mobile app.

I have tried deleting the device and allowing HA to discover it again, but with the same result.

Why has HA not added the missing entities? Can I add them manually somehow?

A power meter that doesn’t report power is not much use to anyone …