Duplicating a project on iPhone

Can anybody help me? I want to duplicate a project not a movie via iMovie on my iPhone. I don’t have a Mac so can’t do it from there. I need to work on two versions at the same time with all elements visible ie. Music layers so I can adjust/change. Instructions so far appear to be if you are working on a Mac I am using my iPhone. Is this possible on an iPhone? I’d really appreciate help as I am working on a project I’m desperate to finish. Thanks