Hey. What he meant was exporting and importing packages like Unity has.
The option to migrate in UE4 is to copy things from one project to another, but it’s not like a package you can pass around so people can import it into their proyects. At least this is what I’ve found out after fooling around with the engine for a few weeks
Just do a rightclick onto the blueprint and then choose “Migrate”. Now it will export the bp + all other bp’s, meshes, texture,… which were part of the bp that you want to export. For example: When you migrate a gamemode bp, the mycharacter, myhud,… gets also exported