Wireguard mobile (phone) to opnsense back to wan?

I am trying to basically route my wireguard tunnel of my phone through to opnsense and back out the wan or other wirguard instance (mullvad). I would like to hide my traffic from verizon while on the go. Is this doable? So I can have access to lan but also internet. Right now it is one or the other. I have lan access but then it doesn’t let me browse sites. Only lab stuff.

I’ve heard (but not tried) of another way to do it: ZeroTier. To my understanding it’s basically emulating physical adapters between two devices that you want to connect with.