[Feature Request] Allow "Add to Project" for All Unreal Marketplace Assets

Currently after downloading a Marketplace asset, it seems that “Add to project” is only allowed for asset packs. It seems that any asset with code in it is not allowed to be added to the project. But even for those assets, after choosing “install to engine”, it works fine after moving it to the project, so why is this disallowed?

Please could you allow this feature, it would be extremely useful and save a lot of time.

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