If you want to validate the ipv6 address, you can use the ValidIpAddressIPV6
rule:
use Milwad\LaravelValidate\Rules\ValidIpAddressIPV6;
return [
'ipv6' => ['required', new ValidIpAddressIPV6()], // ipv6 => 2001:db8:3333:4444:5555:6666:7777:8888
];