Lusa, go to each device, find its IP and mac. From a command prompt, PING each IP address and see if they come back with a timed response or no response at all.

What if? You plugged the printer usb into the router, if it has usb, or dobyou have an old usb hub laying around? Maybe you can plug all printers into the usb hub and try locating the printers that...

I replied last night with a different manual and it didnt post. Here is the link. Hope it helps. https://www.tp-link.com/us/support/download/archer-c80/

@Rnes Ok. So the issue IS with the AP. Its not sending wifi VISIBLY. Now that you know the IP address, I almost want to say ( for shortening troubleshooting times) factory reset the AP and start...

I wonder if TP Link has something similar to this. https://www.amazon.com/Home-Wireless-Audio-Solution-Smartphone/dp/B08L4525P8

https://www.manua.ls/tp-link/ac-1900/manual