Ipv6 dhcpv6-pd /56 help

I met great difficulties to setup fios ipv6 on my 21.02.3 router, test-ipv6 failed and ping6 ipv6.google all packets lost

I changed wan6 section in /etc/config/network, and other settings are default

config interface 'wan6'                   
        option device 'wan'               
        option proto 'dhcpv6'             
        option reqaddress 'try'           
        option reqprefix '56'             
        option norelease '1'

and status seems ok

10: br-lan: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP qlen 1000
    link/ether c4:41:1e:62:d8:4c brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.1/24 brd 10.0.0.255 scope global br-lan
       valid_lft forever preferred_lft forever
    inet6 2600:4040:xxxx:xxxx::1/60 scope global dynamic noprefixroute 
       valid_lft 5656sec preferred_lft 5656sec
    inet6 fd97:1215:e8eb::1/60 scope global noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fe80::c641:1eff:fe62:d84c/64 scope link 
       valid_lft forever preferred_lft forever

but can't ping ipv6.google.com, all packets lost
and traceroute6

traceroute to ipv6.google.com (2607:f8b0:4007:819::200e), 30 hops max, 64 byte packets
 1  *  *  *
 2  *  *  2600:4000:1:224::112 (2600:4000:1:224::112)  11.158 ms
 3  *  *  *
 4  *  *  *
 5  *  *  *
 6  *  *  *
 7  *  *  *
 8  *  *  *
 9  *  *  *
10  *  *  *
11  *  2001:4860::8:4000:ca19 (2001:4860::8:4000:ca19)  41.015 ms  *
12  *  *  *
 *  *  *

what should I do to find out what's wrong? thanks

client side seems a little strange

3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 6c:29:95:17:1f:a6 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.226/24 brd 10.0.0.255 scope global dynamic noprefixroute wlp2s0
       valid_lft 43196sec preferred_lft 37796sec
    inet6 fd97:1215:e8eb::e48/128 scope global dynamic noprefixroute 
       valid_lft 43198sec preferred_lft 7188sec
    inet6 2600:4040:xxxx:xxxx::e48/128 scope global dynamic noprefixroute 
       valid_lft 7188sec preferred_lft 7188sec
    inet6 fd97:1215:e8eb:0:7006:a181:fb3e:ea1b/64 scope global mngtmpaddr noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 2600:4040:xxxx:xxxx:6750:8fac:eeec:cec4/64 scope global dynamic mngtmpaddr noprefixroute 
       valid_lft 4527sec preferred_lft 4527sec
    inet6 fe80::57d7:9f9:1a93:dedc/64 scope link 
       valid_lft forever preferred_lft forever

how come 2 v6 address?

You can even have more.
Like if your DHCP server gives you addresses with a lifetime. You can end up with one link local,one or more ULA addresses and various global addresses. So nothing unusual here.

ifstatus wan6 might be more conclusive.