Can the VFLEX adapter also measure power?

VFLEX is a pass through device for negotiating USB-C Power Delivery output. It does not have the internal electronic circuits to measure current or power.
 
VFLEX is able to measure voltage for the purpose of validating that the output voltage is within a specified tolerance. Voltage data is not logged to memory.
 
If you wish to monitor Voltage and Current, we highly recommend using a inline USB-C power monitor such as this: