Not biblical.
Even worse, it is contrary to the teaching of Scripture, that instructs us to approach the Father's throne with boldness.
It ignores the great teaching in Romans that we have the Holy Spirit interceding for us with words too deep to utter. It ignores the teaching of this great passage that says we have Christ Himself as our Advocate before the Father.
John makes it clear we can come before the Throne and speak directly to Him.
There is no mention of Mary at all. None. And this is important to note as John was charged with the care of Mary.
14This is the confidence which we have before Him, that, if we ask anything according to His will, He hears us. 15And if we know that He hears us in whatever we ask, we know that we have the requests which we have asked from Him. 1 John 5:14-15 NASB