i updated to 23.05 and put my ddns and still 
when i put my ddns domain and token in openwrt it automatically give me my public ip so i guess it's correct
- i also turned off firewall on primary router
root@OpenWrt:~# ubus call system board
{
"kernel": "5.10.221",
"hostname": "OpenWrt",
"system": "bcm63xx/HW556_A (0x6358/0xA1)",
"model": "Huawei EchoLife HG556a (version A)",
"board_name": "huawei,echolife-hg556a-a",
"rootfs_type": "squashfs",
"release": {
"distribution": "OpenWrt",
"version": "22.03.7",
"revision": "r20341-591b7e93d3",
"target": "bcm63xx/generic",
"description": "OpenWrt 22.03.7 r20341-591b7e93d3"
}
}
root@OpenWrt:~# cat /etc/config/network
config interface 'loopback'
option device 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fd18:19a8:8d42::/48'
config device
option name 'br-lan'
option type 'bridge'
list ports 'eth0.1'
config interface 'lan'
option device 'br-lan'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.11.2'
option gateway '192.168.11.1'
list dns '8.8.8.8'
list dns '1.1.1.1'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0 1 2 3 5t'