If I want to start a new data flow based on an existing one, it was not obvious for me, how to do that.
I tried to export and import, but that failed, because I cannot change the name of a data flow when importing.
I then stumbled of the hamburger button, when you have opened a data flow. From there you can "Save as...".
I would like to propose, that you add the same "Save as..." below "Rename" in den Dataverse dashboard where you see the list of data flows (see screenshot below).