GL-B1300 and 802.11ac over 2.4GHz WiFi

It seems that the GL-B1300 only supports 802.11ac over the 5GHz WiFi since that isn’t an options for the 2.4GHz WiFi (see screenshot).

Is this a hardware limitation or something that can be enabled (since it is specified in the standard: IEEE 802.11ac-2013 - Wikipedia).

I should note that NetSpot reports the network as 2.4GHz and 802.11ac, but my MacBook only connects using 802.11n.

802.11ac is only for 5G, not 2.4G