We don't know anyone according to the flesh. Maybe she sits near His throne. Who knows. That's not a problem, but nobody knows her personally. You just assume that she would be honored being treated like a celebrity and I think she would hate it and wants God to get all the glory instead. The Bible says nothing about it. It sounds disfunctional to ask her to ask God for you. As if God is this scary dad and you have to ask mom to go ask him for something. And if God wanted us to do it Jesus could have taught his disciples: go ask Mary, which He didn't.
Even when she was still on earth she did pray with the others, but noone went to her to ask God this for them, that for them, so why do it now?
That is very true. Mary was not treated, in this life, as though she were a celebrity. Indeed, when she is referred to--as, for example, when Jesus was preaching, or when the disciples were gathered in the upper room--her presence was almost always merely noted.
We know that she was virtually 'always there' where Jesus went, the crucifixion included. And she is reputed to have lived for some years afterwards, yet what is known of her doings then is a matter of legend. Different locations were claimed as being her burial place, which gave some local pride to each of these, but no one knows for certain.
As an example, consider this from the Acts of the Apostles, Chapter 1--
“When they had entered the city, they went up to the upper room where they were staying; that is, Peter and John and James and Andrew, Philip and Thomas, Bartholomew and Matthew, James the son of Alphaeus, and Simon the Zealot, and Judas the son of
James. 14 These all with one mind were continually devoting themselves to prayer, along with the women,
and Mary the mother of Jesus, and with His brothers. 15 At this time Peter stood up in the midst of the brethren (a gathering of about one hundred and twenty persons was there together), and said, 16 ‘ “Brethren, the Scripture had to be fulfilled, which the Holy Spirit foretold by the mouth of David concerning Judas, who became a guide to those who arrested Jesus.”
Various specifics are highlighted in that passage, but Mary gets nothing more than a quick mention.