Openwrt 24.10.4, enable wifi = no internet access

[ncompact]

in your configuration file /etc/config/network there is no "lan" interface
either you define it or you modify your /etc/config/wireless.

@testo

config wifi-iface 'default_radio1'
	option device 'radio1'
	option network 'lan' # <-- This interface missing in /etc/config/network
	option mode 'ap'
	option ssid 'OpenWrt'
	option encryption 'none'

If you haven't modified your /etc/config/firewall file you'll need to allow your "lan_wifi" network to go out to "wan":

config zone
    option name 'lan_wifi'
    list network 'lan_wifi'
    option input 'ACCEPT'
    option output 'ACCEPT'
    option forward 'REJECT'

config forwarding
    option src 'lan_wifi'
    option dest 'wan'

I based it on this file (but you may have modified it later):

@testo

/etc/config/firewall

PS: everything proposed assumes that the router has an internet connection (I assume so, but I can't be sure).

analysis: /etc/config/network

There is no section called config interface 'lan'
Instead, several isolated networks are defined:

• lan_local → lan4 → 10.3.29.1
• lan_to_ext_wan → lan3 → 10.2.29.1
• lan_wifi → wl0-ap0 → 10.4.29.1
• lan_wifi_5Ghz → wl1-ap0 → 10.6.29.1

All of these are independent static interfaces, without any bridge and without routing toward the WAN.
That means each Wi-Fi network is essentially a local island:
devices can connect and get an IP address, but they have no path to reach the Internet.