whatsapp iCloud (Mobile Document)

Hi Friends!

Using OSX Catalina I would like to get the iCloud Whatsapp files into my own iBook.

My phone has uploaded about 8GB of WP data into iCloud (I've a 200GB plan),

now I've enabled iCloud Drive and I expect to get these files on my notebook, into directory "~/Library/Mobile\ Documents/".

I've follow this stackexchange question and precisely follow these steps:

1. iCloud setting on iPhone.

Settings->iCloud->Storage->Manage

Storage, make sure you can see “WhatsApp Messages” under

Documents & Data.

2. Turn on iCloud Drive on your

Mac, then check your iCloud setting.

System Preferences->iCloud-> Manage Storage,

make sure you can also see “WhatsApp Message” there. 

3. Make sure the free storage of the computer is

enough, which is more than the iCloud Drive usage data.

4.On power options I have disabled monitor power off, and enabled

Power Nap and disabled disk stop

Followed all these directives, the directory "~/Library/Mobile\ Documents/" still to be only 22kb.

What else can I do?

Thanks!