Hi @Wech,

From the AX23 specifications, its 5 GHz: 1201 Mbps (802.11ax), does not support 160Mhz.WiFi 6 technology supports the highest channel width 60Mhz, and the required 5Ghz negotiation rate is, 2402Mbps.
If you need 160Mhz, you can consider products above AX3000. Because the WiFi specifications of a router usually refer to the sum of 5Ghz rate and 2.4Ghz rate (for example, AX1800=5 GHz: 1201 Mbps (802.11ax)+2.4 GHz: 574 Mbps (802.11ax)), please confirm that the specifications clearly indicate '5 GHz: 4804 Mbps (802.11ax, HE160)' or above.

Regarding the problem of unsatisfactory easymesh speed, are the routers you are currently using Archer AX23? Is the network formed by satellite router and main router Ethernet backhaul or WiFi backhaul?

Here are some tips which might improve the speed of your Archer Router:
    1) If Ethernet speed is slower than expected, please try different Ethernet cables (CAT5E or above) on the Router.
    2) Disable QoS, please access http://tplinkwifi.net and go to Advanced >> QoS to disable it.
    3) Disable Parental Control, please go to Advanced >> Parental Control to disable it.
    4) If wireless speed is slower than expected, please go to Advanced >> Wireless Settings to change the 5GHz Wi-Fi channel, you may try different channels to find the best one for your environment.
    5) Disable SIP ALG and UPNP, please go to Advanced >> NAT Forwarding >> UPNP to disable UPNP, go to Advance >> Security to disable SIP ALG.
    6) Try a few other speedtest servers, other servers might reach better speeds.