Help with IPv6 to L3 switch vlans

[nalman]

I have OPNsense connected to L3 cisco switch(intervlan routing),

OPNSense <--a--> L3 Switch (VLAN 10, 20, 30, 50)
(a) Connection is made via routed Port-Channel 4.


Prefix delegated from ISP to OPNsense is /56,
WAN (PPPOE + DHCPv6),
LAN (Track Interface "WAN")

On OPNsense, DHCPv6 it is showing that ::/62 is been delegated to the switch

Switch:
ipv6 source-route
ipv6 unicast-routing

Interface Port-channel 4
no switchport
ip address 192.168.1.2 255.255.255.252
ipv6 address autoconfig
ipv6 dhcp client pd PREFIX
ipv6 dhcp client request vendor

Interface Vlan 10
ip address 192.168.10.1 255.255.255.0
ipv6 address PREFIX 0:0:0:1::/64 eui-64

Interface Vlan 20
ip address 192.168.20.1 255.255.255.0
ipv6 address PREFIX 0:0:0:2::/64 eui-64

............
after adding,,,
ipv6 route ::/0 2001:(LAN IPV6) address

Google DNS(2001:4860:4860::8888) is ping-able from the switch terminal, but,
PCs attached to vlan 10, 20 although inherit valid ipv6 addresses can not reach internet as matter of fact can not even reach OPNsense.

Any help is really appreciated.