question #3 Sahih al-Bukhari 1097, Book 18, Hadith 17 : What flexibility is allowed in the direction faced during Nawafil prayers while traveling?

I saw the Prophet (ﷺ) on his Mount praying Nawafil by nodding his head, whatever direction he faced, but
Allah’s Messenger (ﷺ) never did the same in offering the compulsory prayers.