Hello@Ahmed_Dar ,

Welcome to our community.

Regarding the reduced channel options, this is likely due to regulatory restrictions implemented in the firmware update. The 160 MHz bandwidth, or certain channels, might not be available in the 5 GHz band in some regions/countries due to these regulatory requirements.

Please try the following suggestions:

1. Open the Tether app and go to Tools > Wireless Settings. Ensure the 5GHz network is enabled and not hidden. Alternatively, for router models equipped with Wi-Fi indicator lights, check if the Wi-Fi lights are on (usually in green). There is a Wi-Fi button on the back panel; press and hold this button for approximately 2 seconds to activate the wireless function.

2. If only the 2.4GHz network (TP-Link_XXXX) is visible and the 5GHz network (TP-Link_XXXX_5G) is not, please disable the "Smart Connect" feature from the Tether app or web interface.

3. Update the driver and operating system on your client device.

4. Check whether your wireless devices can detect the wireless networks from another router for comparison.

5. Try rebooting the router. 

6. Try a hard reset as a last resort.