Issue with IPSEC Site 2 Site as a Gateway

[congdo]

I have already set up a site 2 site vpn and it working great.

The issue is when I want to share the vpn subnet to another subnet not in the vpn.
I have try virtual ip with the vpn subnet and routing or nat and its not working.

I made a work around by setting up another machine with a vpn subnet and nat.

Could someone shine some light on how to do this or give me a link, on sharing the access to a vpn subnet outside of the subnet without having to setup another machine to make it work.

Thanks you

[userbenutzer]

Do you have setup a route based (VTI) Site to Site?

https://docs.opnsense.org/manual/how-tos/ipsec-s2s-route.html