tunnel firmware/pkg downloads

[IceFox]

Hello everyone!

I can't figure out how to tunnel OPNsenses update downloads through one of my wireguard interfaces.
Does anyone know how I could achieve this?

I tried setting the wg interfaces as the default gw but then it seems like wireguard is trying to reach it's server through the interface rather than WAN.

A possible solution might be to default everything through a wireguard gw group and then somehow redirect wireguard through the WAN gateway. Is this possible? Is this preferable?

My ISP seriously messes with my connection and also blocks and spoofs dns requests so I would really prefer to update my system through a tunnel.

Very thankful for any answers/tips/suggestions!