If your AP is connected by wire, devices connected through the AP will be reported as Wired. Because the router does not know how the device is connected to the AP.
If your AP is a WiFi extender, then devices connected through the AP will be reported as wireless, even for devices wired to the AP.
Since there is no way to communicate the nature of the connection between the router and the AP, the router cannot report on how a device is connected to the AP. Nonetheless, parental control works the same for wired and wireless connections.