SetupLoclx to point to VPN port on my firewall

Hello, I am new to Loclx and am trying to find out if what I’m trying to achieve is even possible.

I recently got an internet modem that does not allow port forwarding. It’s my back up internet modem. My primary has been down for a few days because of Hurricane Ian. I am trying to see if I can create a reverse proxy using localx for the VPN port on my firewall?

Since I cannot forward the VPN port on the modem, I am hoping I can somehow use loclx to achieve this.

Any help is appreciated.

Thank you

Dan