@HieuChu May I know the operating system of your computer? Windows 10? You may try to update the driver to be 22.0 then monitor the connection again:...

@Nuno_Pereira Are you able to get the band option under Basic->Internet page?

@Davigc Hello, May I know what is the current Windows version of the computer, 1909, or 2004? You may verify it as below: https://www.tp-link.com/support/faq/2722/ Were you unable to detect any 5ghz...

@theproblemguy Hi, apologies for the super late reply. Please refer to the below troubleshooting guide to confirm some basic info if the adapter cannot be detected by your computer:...

@Berserk76 Do you mean you enabled the Auto-reboot Schedule on the MR600, while it doesn't take effect at the scheduled time? Ensure the router Time Settings are correct, you may try with another NTP...

@Patrik_S Yes, it supports AX by default on Guest Network.