How to find out what was deployed to a target instance?

Summary:

It is clear that you can see what deployments have been made into a specific environment from the environments page within a project.

But how can one check if code was deployed using a different project, or even a different Visual Builder instance? It seems to show only the deployments made by the current project.

Also, how to sync the main branch in the current project to the code in the target environment?

We need to be able to review the changes already done to a system without having access to the original project that created them.

Version (include the version you are using, if applicable):