The only working setup i got working was this.
# jan/08/2023 20:00:23 by RouterOS 7.6
# software id = 6YG9-YNT9
#
# model = C53UiG+5HPaxD2HPaxD
/interface wifiwave2 channel
add frequency=2412,2437,2462 name=ch-2ghz width=20mhz
add frequency=5180,5260,5500 name=ch-5ghz width=20/40/80mhz
/interface wifiwave2 security
add authentication-types=wpa2-psk,wpa3-psk group-key-update=1h name=sec1 wps=disable
/interface wifiwave2 configuration
add channel=ch-5ghz country=Estonia mode=ap name=hub-cfg security=sec1 ssid=Hub2
add channel=ch-2ghz country=Estonia mode=ap name=hubz-cfg security=sec1 ssid=Hubz2
/interface wifiwave2
set [ find default-name=wifi1 ] channel.frequency=5170-5330 configuration=hub-cfg \
configuration.mode=ap disabled=no security.authentication-types=wpa2-psk,wpa3-psk
set [ find default-name=wifi2 ] channel.frequency=2412,2437,2462 configuration=hubz-cfg \
configuration.mode=ap security.authentication-types=wpa2-psk,wpa3-psk
It does not matter what channels you set if any. When you select 20/40/80/160 it immediately says no channels available.
By looking at the radios tab i can see that there is no 160 radio listed. Just a wild guess here, but should there be?