I see that VHT is available on both my 5ghz APs but not on my 2.4ghz aps. See screenshot.
Very High Throughput i.e. 802.11ac
Thats normal. Your 2.4 ghz supports "high throughput". Your 5 ghz supports "very high throughput".
Its 802.11n vs ac. Basically, technological progress as a result of the work of very smart people.
VHT is 802.11ac, HE is 802.11ax.
Yep sorry that was a typo. thanks
my tplink_eap245 is only ac, but still reads VHT.
That is exactly as it should be. You even quoted @Borromini saying just that.