question #1 Sahih al-Bukhari 4731, Book 65, Hadith 253 : What is the significance of the relationship between the Prophet Muhammad (ﷺ) and the angel Gabriel in Islamic teachings?

The Prophet (ﷺ) said to Gabriel, “What prevents you from visiting us more often than you visit us now?”
So there was revealed:–
‘And we (angels) descend not but by the command of your Lord. To Him belongs what is before us
and what is behind us…'(19.64)