Error in changelog or hidden change

There is a very interesting change in the changelog:

• Lush caves can now contain classic "jungle" vines

Lush caves haven't been added yet (in bedrock version).

https://feedback.minecraft.net/hc/en-us/articles/360059243391-Minecraft-Beta-1-16-230-52-Xbox-One-Windows-10-Android-

https://www.minecraft.net/ru-ru/article/minecraft-changelog-1-16-230-52

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Of course, I realized that we are talking about "hidden" generation files in the game. But they are hidden) 

But the caves look cooler now.