Hello @william212
Thank you for reaching out to us and welcome to the TP-Link community. Sorry to hear the speed is not as good as expected, please help verify some details and we will try to fix it together:
1. How about the link speed on the PC that is equipped with a Wi-Fi 6 wireless adapter? You can follow this FAQ to confirm it. Ensure the driver of the adapter has been updated to the latest version. If possible, please provide the brand and model of the adapter for further analysis.
2. Please check and disable QoS on the AX55 or try to reset it to the factory defaults, then reconfigure it from scratch to exclude all settings that may limit the speed.
3. Regarding the 5G wireless settings on the AX55, you could try to find a clear channel, change the channel width to 80MHz, then reconnect to the network and test the speed again.
4. If possible, please connect another device to the 5G network and test the speed to check if you can get a speed as expected.