I can see this is an old post but I’m coming with more or less the same question. Is it possible to import/export your whole folliage scatter? This would open a whole word of possibilities from film/animation perspective.
This blog post shows import and export buttons but I can’t find them in 4.23, 4.24, and 4.25 https://cheneyshen.com/unreal-foliage-import-export/