Auto-create post based on new user's field entry upon registration

Hello team - how do I implement this (screenshot below).

Upon registration, users fill out certain fields (Favourite book, podcast etc) [this one I know how to do]
A new post is automatically created (Inside a ‘meet your cohort’ category) by each new user, with their username and the contents of a specific field as the post body. This enables others to more easily engage and say hello.

Admin -> Customise -> User fields

See the custom wizard plugin.