Could you give some context where you are seeing HNEA? Maybe a picture uploaded to Imgur? I couldn't find a definition online but my guess is Home Network something Automation? I am hoping the context of where the option is will give a clue to the E. Ethernet?
As for WPA3 you need at least Wi-Fi 6(AX) devices to support it so most routers have a mixed WPA2/WPA3 mode. If not you can change that in the settings. What model router do you have for instructions?