Aupmanyav
Be your own guru
Wait, it is a question for 22nd Century or later. How can one understand it today? We do not know what may crop up tomorrow. Whether relativity or quantum mechanics, all things came to be known in their own time. Did we know CMBR before 1965? Things take time.But that doesn't tell us if there is no time prior to the universe.
"The accidental discovery of the CMB in 1965 by American radio astronomers Arno Penzias and Robert Wilson was the culmination of work initiated in the 1940s, and earned the discoverers the 1978 Nobel Prize in Physics."
Cosmic microwave background - Wikipedia