I've got Opnsense set up with a Mullvad tunnel over Wireguard and selective sites and clients going out through that tunnel just fine for IPv4. How can I achieve the same thing with with IPv6? As far as I can tell, it's only possible to add one gateway address, which is later used in the System / Gateways -screen.
(https://i.imgur.com/nKPLddQ.png)
The steps for adding IPv6 are here:
https://docs.opnsense.org/manual/how-tos/wireguard-selective-routing.html#configuring-ipv6
Can confirm. this works! Thanks for the update.