When you create ACL rules, the count parameter enables you to display counter statistics.
device# configure terminal
device(config)# ipv6 access-list extended ip_acl_1
device(conf-ip6acl-ext)# seq 20 deny ipv6 2002:2003:1234:1::/64 2001:3001:1234:1::/64 count
device# show statistics access-list ipv6 ip_acl_1 in ipv6 access-list ip_acl_1 on Ethernet 2/3 at Ingress (From User) seq 10 deny ipv6 2001:2002:1234:1::/64 2001:1001:1234:1::/64 count (0 frames) seq 20 deny ipv6 2002:2003:1234:1::/64 2001:3001:1234:1::/64 count (33 frames)
device# configure terminal device(config)# ipv6 access-list extended ip_acl_1 device(conf-ip6acl-ext)# seq 10 deny ipv6 2001:2002:1234:1::/64 2001:1001:1234:1::/64 count