Does the Nighthawk R7000P support PoE

> I've read through the manual but can't find any information on this.
> [...]

   I'd call that suggestive.  If the router User Manual fails to
mention PoE, then I'd bet that the router doesn't have a built-in PoE
power supply.

   You should be able to get a PoE power supply/injector which is
compatible with your (unspecified) "a device", and use it with the
R7000P, but the same would be true for practically any router which has
no PoE capability.

   I'd guess that it'd be easier to find a network switch with some PoE
capability than it would be to find a consumer-grade router with it.