whatsapp messenger – Is the "work profile" an AOSP feature, where is it documented?

I could not find much documentation on how the "Working Profile" function works (or maybe it's called Android).

It appears that the feature attempts to provide two distinct user profiles (similar to the "max 4 users" multi-user feature), but with the difference that applications can be run side-by-side without disconnection or connection (as would be the case with multiple-users)

I know that some software (like a shelter) uses the "work profile" feature to create a sort of sandbox for "bad apps" (for example, WhatsApp that would abuse the defective AOSP permissions system to access to all contacts, even if it was not necessary).

This question looks for information where to find documentation and explanations on the functioning of this "work profile".