Set the destination of the NAT translation to OVPN_VPN address.
Be sure the rules passing the traffic do not match on the OpenVPN Group tab, but do match on the OVPN_VPN tab. The easiest way to be sure is to not have any rules on the OpenVPN tab. Care will have to be taken if you have other OpenVPN servers or clients defined.
Be sure the default gateway of the 192.168.0.233 host is pfSense.
Be sure the firewall on 192.168.0.233, if any, passes traffic from arbitrary sources.
https://www.netgate.com/docs/pfsense/nat/port-forward-troubleshooting.html
If you take more packet captures, please do them on the 192.168.0.0/24 interface the server is on. If you don't see any traffic there, check all of the above again.