opnsense + unifi usg

[TaceN]

Hey guys,

I've got a working installation of mac and connected through a VPN client to ExpressVPN.
I've also got a Unifi USG.

I would like to route specific devices over VPN, Through the opnsense installation.

I've got it connected like this.

CPE
- Port 1: Unifi USG
- Port 2: Opnsense

Unifi USG
- WAN1 - CPE port 1
- WAN2 - interface (network card 2, USB) opnsens

Is it even possible to route traffic through the devices connected like this?

Thanks

/ T