Is  Archer AX21 even a current supported product?  It's not listed in the Model drop-down menu, here on the "New Thread" page.

I need a WAP and bought this router without doing much research.  Every other wifi router I've worked with had an AP mode, so I guess I assumed any wifi router could be used as a WAP.

Do I need to return it an buy a different device?  What would you suggest in that case?

I want to have two WAPs on the same network, plugged into the same switch.  This is just to give more coverage from the front of the house to the back.  I found a support article "How to configure the TP-Link wireless router as Access Point" here: https://www.tp-link.com/us/support/faq/1384/

Followed the instructions, but it didn't work.

I tried chat with a support agent, but they didn't seem to understand what I was talking about.

Thanks for any advice you may have!