I think you'll need to modify your Google Script for that Sheet so that whatever function you are invoking to GET row data takes in an additional parameter for the row value.
Does that make sense?
Two of those 10mA come from the ATECC608 crypto chip which idles at 2mA. That leaves 8mA for you to track down.
The WiFi-NINA module has multiple "sleep" modes that range from 30mA down to 4.5µA. Since you can't be in the 30mA "modem sleep" mode (it's too high for your measurements) I suspect it enables "light sleep" at 800µA.
The switching regulator ...