Help configuring IPV6 (6rd) connection via WAN

I have a OpenWRT router that gets internet connection via WAN port of my ISP modem (locked, few settings available) connected to router's eth4 port.

My ISP uses ipv6 via 6rd, as i have this option in the control panel:
Modem

Right now I'm able to ping ipv6 addresses from the router.

What I want is a working ipv6 internet connection for the devices connected to LAN ports of the router, because I can only access ipv4 sites. When connected to LAN ports of the modem ipv6 works correctly. Can you help me please? Thank you. I leave some logs below.

root@router:~# ip -6 route show
default from 2001:b07:xxxx:yyyy:22b0:1ff:11ef:ab13 via fe80::1 dev eth4 proto static metric 512 pref medium
2001:b07:xxxx:yyyy::/64 dev eth4 proto static metric 256 pref medium
fde4:93db:5010::/64 dev br-lan proto static metric 1024 pref medium
fde4:93db:5010:1::/64 dev wl0_1 proto static metric 1024 pref medium
fde4:93db:5010:2::/64 dev wl1_1 proto static metric 1024 pref medium
unreachable fde4:93db:5010::/48 dev lo proto static metric 2147483647 error -101 pref medium
fe80::/64 dev br-lan proto kernel metric 256 pref medium
fe80::/64 dev wl1_1 proto kernel metric 256 pref medium
fe80::/64 dev eth4 proto kernel metric 256 pref medium
fe80::/64 dev wl0_1 proto kernel metric 256 pref medium
fe80::/64 dev wl0 proto kernel metric 256 pref medium
root@router:~# ip -6 address show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
15: eth4: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
    inet6 2001:b07:xxxx:yyyy:22b0:1ff:11ef:ab13/128 scope global noprefixroute
       valid_lft forever preferred_lft forever
    inet6 fe80::22b0:1ff:11ef:ab13/64 scope link
       valid_lft forever preferred_lft forever
20: br-lan: <BROADCAST,MULTICAST,ALLMULTI,UP,LOWER_UP> mtu 1500
    inet6 fde4:93db:5010::1/64 scope global noprefixroute
       valid_lft forever preferred_lft forever
    inet6 fe80::22b0:1ff:11ef:ab13/64 scope link
       valid_lft forever preferred_lft forever
root@router:~# cat /etc/config/network

config interface 'loopback'
        option ifname 'lo'
        option proto 'static'
        option ipaddr '127.0.0.1'
        option netmask '255.0.0.0'

config globals 'globals'
        option default_ps '0'
        option ula_prefix 'fde4:93db:5010::/48'

config interface 'lan'
        option type 'bridge'
        option proto 'static'
        option netmask '255.255.255.0'
        option force_link '0'
        option rpfilter '1'
        list pppoerelay 'eth4'
        option ipaddr '192.168.0.254'
        option ip6assign '64'
        option ipv6 '1'
        list ifname 'eth0'
        list ifname 'eth1'
        list ifname 'eth2'
        list ifname 'eth3'
        list ifname 'eth5'

config switch 'bcmsw'
        option reset '1'
        option enable_vlan '0'
        option qosimppauseenable '0'
        option jumbo '0'

config interface 'public_lan'
        option ifname '@lan'
        option proto 'static'
        option ipaddr '0.0.0.0'
        option netmask '0.0.0.0'
        option disabled_info 'proto=static,ip=0.0.0.0,mask=255.255.255.248'
        option auto '0'
        option ipv6 '1'

config interface 'wan'
        option demand '0'
        option password 'alicenewag'
        option macaddr '20:B0:01:29:52:BA'
        option peerdns '1'
        option reqopts '1 3 6 15 26 33 42 51 121 249'
        option keepalive_adaptive '0'
        option dns_metric '0'
        option netmask '255.255.255.0'
        option ipaddr '192.168.1.1'
        option gateway '192.168.1.254'
        option username '20B001@00000.agcombo.unicav6'
        option ipv6 '1'
        option auto '1'
        option proto 'static'
        option ifname 'eth4'

config config 'config'
        option wan_mode 'static'

config interface 'sfp'
        option proto 'static'
        option ifname 'eth4'
        option ipaddr '192.168.2.2'
        option netmask '255.255.255.0'

config interface 'voip'
        option proto 'dhcp'
        option macaddr '20:B0:01:29:52:BB'
        option ipv6 '0'
        option peerdns '1'
        option reqopts '1 3 6 15 26 33 42 51 121 249'
        option vendorid 'DGA4132_CP1913TADFH'
        option ip4table 'voip'
        option defaultroute '1'
        option dnsset 'voip'
        option auto '0'

config interface 'ipoe'
        option proto 'dhcp'
        option metric '1'
        option reqopts '1 3 6 43 51 58 59'
        option release '1'
        option neighreachabletime '1200000'
        option neighgcstaletime '2400'
        option ipv6 '1'