wireless interfaces only running 802.11b despite n capability/ GUI config

[jnm]

I have an Atheros AR9280 PCI-e card in an APU, and have configured two virtual NICs in the GUI to use 802.11ng. Best I can tell from https://wiki.freebsd.org/WiFi80211n, there's a driver that supports 802.11g/ng on that card. OPNsense 17.7.9_8-amd64, though, is actually using 802.11b for the interfaces, though.

I'm very comfortable in a Linux environment, but FreeBSD is just unfamiliar enough to leave me floundering a bit. Any idea how I can confirm which driver is being loaded, and can I change that or confirm hardware support somehow?

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EDIT:

Weird: Looks like manually setting the channel to one using 11ng forces the issue. Channel should auto-select ng when Standard is set that way, huh?