pfSense

I'm not able to confirm this. Going to Status --> DHCPv6 Leases --> Related Settings link at the top goes to the DHCPv6 Server configuration on my 23.09.1 appliance.

Is there another settings link that I'm missing here? What is the exact path?

It is, indeed, the related settings link. on my system, this is a link to
https://<fqdn>/services_dhcp.php - it should be https://<fqdn>/services_dhcpv6.php

Also, the Related Status link points at https://<fqdn>/status_dhcp_leases.php - i guess dhcp v4 is related, but it is not clear what was intended there. In status_dhcp_leases.php, the related status link points back to itself, so I think that the related status of the v6 page should be consistent and point back to itself.

An argument could be made that a link pointing back to the page containing it is not very useful and should be removed, which might be easier.

this seems to be generated by the function get_shortcut_main_link() in shortcuts.inc

I am running the same version as Danilo confirmed with.