@Mansoor267 

Hello,

We would do some troubleshooting first to narrow down this issue and try to fix it.

1. Ensure the firmware of your C6 is up-to-date, and show me the screenshot of the firmware version, thanks.

2. What kind of device are you testing with this 2.4GHz wireless connection? How about the link speed on it? If it is a computer, you may check it like below:
https://www.tp-link.com/support/faq/2265/
Note: If the link speed is not as good as expected, please try with another computer with a more powerful wireless adapter. BTW, tell us the model number of that wireless adapter that runs on your computer.

3. Are you testing the speed by speedtest.net? Please try to download the Speedtest app on your computer and simplify your network layout if there are other routers or RE in your network, just leave the modem and the AX10 on, disconnect other devices and run the Speedtest app 3 times. Please ensure the 2.4GHz wireless channel width is set to 40MHz.

4. Please disable QoS on the C6 or try to reset it to the factory defaults, then reconfigure it from scratch.

May it help.