You can't clone a policy to a different management station unless you use a tool like the following:
https://community.checkpoint.com/t5/API-CLI-Discussion-and-Samples/Python-tool-for-exporting-importi...However, this script has some limitations and some parts of the configuration will have to be migrated manually.
You could also "write your own" program (using the API) to do this.
Again, without knowing precisely how the migration occurred, its difficult to provide specific advice.
In general, anything around gateway objects (which includes some aspects of VPN configuration) cannot be exported/imported via the API using supported calls.
Most likely that configuration would have to be recreated manually.
That could also impact NAT rules depending on exactly how they were created (automatic ones can be tied to a gateway and should be double-checked, manual NAT rules should migrate).