@XDA_EdgarPoe Was this Archer AX90 purchased in Canada? If yes, then the missing channels could have to do with how the 5 GHz band is regulated by the Canadian government. It might be a good idea to...

@XDA_EdgarPoe So, channels 120, 124 and 128 are not available, which must be the reason why you can't select 160 MHz channel width. I think you will need the help of TP-Link support engineers to...

@XDA_EdgarPoe Yes, it should be the 5G2 radio. How many channels are you able to choose from in the "Channel" drop-down menu? For 160 MHz channel width you need eight consecutive channels available,...

@ASimpleUser The TP-Link representatives in this forum have stated a few times they are not ready to share information about their next-generation high-end model yet. Apart from that, according to...

@XDA_EdgarPoe Note that this particular router model only supports 160 MHz bandwidth on one of its two 5 GHz radios. https://www.tp-link.com/en/home-networking/wifi-router/archer-ax90/#specifications

@Sundyp https://community.tp-link.com/en/home/forum/topic/505072