Why i can't tag(vlan) traffic @ cAP_ac 802.11ax

And that's the same amount of feedback in relation to the info you gave.
Only a screenshot, serious ??

cAP_ac 802.11ax what?
JFYI - wifi-qcom-ac doesn't support things you are trying to do.

I apologize for the brevity of my previous communication. I believed the attached image would clearly convey the situation, but I now understand that the driver is the limiting factor.