Combine IPv4 and IPv6 firewall rules
There should only be one list of firewall rules, with IPv4 and IPv6 as options within each. So each rule can apply to v4, v6 or both simply by toggling the appropriate check box. (See pfSense. This is how it handles firewall rules and it's far superior.)
The current separate list of IPv6 rules requires double the effort to set up matching rules and can result in overlooking one or the other protocol.