In the FAQ:

    07 How do you make the illustrations?
    By hand, in Figma. There's no secret - it's as complicated as it looks.

using hand??? not after effect ?

god damn, that's some patient making animation right there

Respect

He has more content with figures on another platform: https://typefully.com/DanHollick

The pair of animations on the page are beautifully done, not just technically but aesthetically as well. If the rest of the book is like that I'll be getting a copy.