Bought marketplace items added to survival world for switch

There’s a lot of custom elements you can find in the marketplace but it seems a shame that you can’t use the content you buy on your own world! I think it’d be good if you could get the items or mobs from these custom worlds and add them to your own world on the switch without the need of a second account on pc or something. So when you buy something that adds animals you can CHOOSE to play it in your own survival world solo instead of being forced to play on a custom map and only the custom map. Furthermore this means multiple packs could be added to enrich your minecraft experience (ex: getting more animals and more furniture) so you can have both! A new world with addons for solo players adds so much more variety and maybe some of them have to be on a custom map but there should be a category for just something you can slap on your own survival world!