I’m not sure what you mean. My knowledge of UE is very basic, just getting started. All I know is that I followed the tutorial at Opening Doors | Unreal Engine Documentation step by step. Then I saved everything, not save as, just save, and copied the whole folder to the Windows PC, opened the project, and it was different. That I did in 4.27. Then I did in 5. Then I did in 4.23, but this time in the PC and copied to the Mac. Same problem.
I think evidently this is some kind of bug that perhaps is linked to the starter content. Perhaps something in it prevents the other platform from opening it correctly.