I bought it before I tried; I have "Show this iPhone when on WiFi" checked in Finder / Locations / myiphone, but alas - my iphone does not show up in the menu.

I bought it before I tried; I have "Show this iPhone when on WiFi" checked in Finder / Locations / myiphone, but alas - my iphone does not show up in the menu. My Apple Watch showed up in the menu for a few minutes (with no battery level) and then disappeared. I guess I'll try restarting each device to see if that helps.