@Jaycero Have you set the Windows firewall to allow incoming SMB connections from remote clients? By default Windows firewall blocks access from remote clients and you have to manually allow either...

@KarlosCorreia Use another WiFi monitoring software. Try Acrylic Wi-Fi Home, for example. I have an AX50 and also an 160 MHz-capable router from another brand and NetSpot for Windows shows channel...

@mat_919 If you have to have a Tri-Band router like your A20 is, then I believe the top-of-the-line Archer AX11000 would be the only one with DFS channels that TP-Link currently has to offer.

@KokeshKokesh I faintly remember I have seen this before on my router, which is a different TP-Link model, though. I think it was something to do with how the process was started. On my model the...

@Tuhin-BD In the configuration interface of your router under "Wireless Settings", can you check if there is an option called "Enable WDS"?

@PiratesSon Do you happen to have the exact model numbers of the Samsung J Series phone and the Chinese tablet at hand?