Soft 404
Congratulations,sister. Zero W is rare now. I am using a Pico. I am satisfied.
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The Pico isn't that good at power saving. The Raspberry designers mentioned it wasn't one of their main goals.
The new SDK1.5 comes with some low power examples (in PicoSDKv1.5.0\pico-playground\sleep). I'll have a shot at measuring them.
quick check, each time with a 1.8V supply (power to VSYS). No debugger attached.
Dormant example
Sleep example
Hello World Serial (with nothing attached to the serial pins)
Hello Multicore
baldengineer did some measurements too, on a W:
Keep in mind my measurement was with a daily build of MicroPython. So, it's possible the consumption is a bit lower now.
But, as Jan Cumps said, the RP2040 isn't known for its low-power abilities. I think the datasheet value for deep sleep is around 1 milliamp!
My estimation is microamps.The RP2040 is definitely an order of magnitude higher so it masks the WiFi module's sleep mode.
