I’ve been testing this and you can set the visibility on “false” for those components after placing them on your island (as you can see in the following video). With this you should be able to copy and paste the edited version on edit mode without any issue.
I solved it in a different way in my case, but keep in mind those assets are also exposed to Fortnite Creative and those users do not have the options that UEFN users have, so the asset has to work out of the box.