[marcosdumay]

And "not knowing about" a service is enough of an excuse to hide any errors of those services it's configured to run?

[lksgkjhsgkjh]

Umm, how did you configure networkd to run wpa_supplicant?

Hint: Networkd doesn't run wpa_supplicant. So it can't "hide" anything about it. Or only as much as `ifconfig` "hides" errors from wpa_supplicant.