The reason why psychiatrist did not is a rule.

However there is a book from a team going into it from ‘18. They did go into his narcissism. So did his niece.

Here,the book I was referring to

https://books.google.com/books/about/The_Dangerous_Case_of_Donald_Trump.html?id=716HDwAAQBAJ&printsec=frontcover&source=kp_read_button&hl=en&newbks=1&newbks_redir=0&gboemv=1