I have a RAX50 and like the last person with the latest firmware in place

[Freestylesno]

I managed to enable mixed on my rax15 but using the night hawk app. No sure why it's not listed in the web page. 

[Freestylesno]

I should add the web page shows none when wpa2/3 is enabled .  But can confirm my phone was connected with WPA3. 

[plemans]

You put in the title that you have an RAX50 and then RAX15 in the subject. 

What actual router do you have? 

what actual issue are you having? Your description wasn't very detailed and is very vague. I can guess at stuff but a better description would be better versus just throwing things out there.