I have try this
5G Wi-Fi still disappear.
Here is some information.
root@AX6S:~# cat /etc/openwrt_release
DISTRIB_ID='OpenWrt'
DISTRIB_RELEASE='23.05.3'
DISTRIB_REVISION='r23809-234f1a2efa'
DISTRIB_TARGET='mediatek/mt7622'
DISTRIB_ARCH='aarch64_cortex-a53'
DISTRIB_DESCRIPTION='OpenWrt 23.05.3 r23809-234f1a2efa'
DISTRIB_TAINTS=''
root@AX6S:~# lspci
root@AX6S:~#
root@AX6S:~# cat /etc/config/wireless
config wifi-device 'radio0'
option type 'mac80211'
option path 'platform/18000000.wmac'
option channel 'auto'
option band '2g'
option htmode 'HT40'
option country 'CN'
option cell_density '0'
option noscan '1'
config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'ssid'
option encryption 'psk-mixed+ccmp'
option key 'password'
Any idea?