Well, the Protestants could very well be correct, and it is enlightening to see that you apparently agree.
As for Mary, of course He could have.
And I'm sure if He did, He also would have considered it important enough to put into the Holy Scriptures.
It can't be found there.
Neither can her "assumption" which is "assumed" by some.
Syncro, you wrote:
“And I’m sure if He did, He also would have considered it important enough to put into the Holy Scriptures.”
Why? God never provided an inspired Table of Contents for the Holy Scriptures so how do you even know what books belong in the Bible?