[Question] Do children lose ‘childlike curiosity?’ Why?

A com­mon story goes:

Young chil­dren love ask­ing ‘why’, and they of­ten have an earnest cu­ri­os­ity about it that is rare in adults. Some­thing about the pro­cess of grow­ing up seems to cause that childlike cu­ri­os­ity to stag­nate.

There’s a lot of com­pel­ling ex­pla­na­tions about so­cietal norms that ac­tively stamp out that cu­ri­os­ity (i.e. school train­ing kids to con­form and re­gur­gi­tate facts, par­ents sub­tly pun­ish­ing kids for ask­ing ques­tions, etc). It seems likely to me that these are at least part of the story.

But it also wasn’t ob­vi­ous that they were the whole story. I could eas­ily imag­ine it also just be­ing the case that small chil­dren are op­ti­mized for learn­ing and older hu­mans are op­ti­mized for do­ing and the brain au­to­mat­i­cally shifts away from it. [edit: or that this whole thing is imag­ined]

Are there any cross-cul­tural stud­ies that do any­thing to check how this phe­nomenon varies, de­pend­ing on up­bring­ing?