How to extract all WhatsApp data before Feb 8 2020 when privacy terms change against your favour?
I originally wrote this as a comment, but since one user suggested I write it as an answer, here it is:
I'd recommend using iMazing for managing, exporting, and viewing, your iOS device's files. One particularly nice feature that iMazing supports is the ability to export WhatsApp conversations in PDF form as well as all media items. NOTE: the free version of iMazing is limited to a certain number of exports, though.
iMazing's website has pretty detailed guides and explanations on how to manage your WhatsApp data. Go to their &quot;Export WhatsApp Chats&quot; page (feel free to read it to see what you can do with iMazing) and scroll down to the How To's section. Here, you'll see the following support pages:

How to export and Print WhatsApp Chats and Attachments from iPhone? (link)
How to transfer WhatsApp from one iPhone to another? (link)

They include YouTube videos as well in their support page articles to show you how to export the data. All the GUI interface pictures are for their macOS version, however the procedure is virtually identical on Windows.

On a side note, iMazing also provides a very powerful feature: exploring your iPhone's file system (support article here). It's a super cool feature that allows you to explore how iPhones store their data and all.