This may not be the right place to ask and I'm sure someone will be happy to point me in the right direction.
One reason for getting the OpenWRT One was for PoE so I wouldn't need yet another device plugged into my UPS.
Unfortunately I didn't read the specs well enough and it seems that PoE is only available on the WAN port? That seems like an oversight. My FiOS comes in via ethernet and plugs into the WAN connector but it doesn't provide PoE. My LAN side, however, is connected to a switch that does provide PoE. Why wouldn't PoE be available on both ports or, at minimum, on the LAN side? Am I missing a logical step here? I'm not going to plug my incoming internet connection directly to the switch so it doesn't make any sense.
A common scenario is for CPE devices that are powered on the wan by the ISP side, as probably the majority of users do not have PoE on their lans.
That said... they're just "ports" so they can be reassigned. Aside from the fact that one of them is 2.5G and the other is 1G, the ports are not hard coded as wan or lan ports... they're just eth0 and eth1. So, you can simply edit the config such that where eth0 is currently used becomes eth1 and vice versa. Then, you can use your PoE switch to power the OpenWrt One.