n3t_admin
Okay, so please disregard. I'm a freaking idiot. I'm used to "Always On" meaning just that. However, apparently this is a routing VPN, and the VPN isn't on until you try to pass some "interesting traffic" across it.
I had been basing my "it's not working" diagnosis on the status bar of the pfSense -> VPN -> Wireguard being red, when I hadn't actually tried accessing anything on the home network from the phone. When I actually did THAT, the status went green and I was able to access the home resources. So the thing actually works after all.
@n3t_admin , I want to thank you for trying to help me, especially when it turns out that I'm just an idiot. I actually deal with IPSec tunnels all the time at work, but our tunnels always show as up even when no traffic is passing through. So please forgive my ignorance but accept my thanks for helping! It sure is appreciated!