Passing internet connection from Qubes to Windows Laptop via ethernet

I am trying to pass an internet connection from Qubes to Windows via an ethernet.
Ideally, I would like to connect from the Windows PC > Qubes proxyVM > vpnVM > firewall > sys-net.

I’ve been able to connect via ethernet to sys-net but not access the internet. When I tried WIndows PC to proxyVM it didn’t work as the ethernet connection would just displace eth0

Can anyone help with this?