Currently, no HE device can be powered via POE, neither the C8 nor C8Pro (nor any earlier devices). They accept power over either microUSB, or USBC connectors only.
That said, numerous folks use POE adapters, to power their hubs, but the C8Pro is a bit more sensitive, and can have Zwave issues depending on the a adapter used - Procents seem to work well - See: PoE and the C8 (with extensive testing)
I'm not sure I entirely understood your question, but the POE status is accurately described above - For power, no POE natively, and sensitive to the adapter used, but the hub can use a POE cable for it's ethernet connection, it will just ignore the power lines of the RJ45, and is solely powered by it's USB female connector.