No scriptual support? How about Genesis 3:6 and then how about Luke 1:30 for starters? It is scripture.
Yup, no Scriptural support.
Yes, Eve ate first but sin didn’t enter until Adam ate. That doesn’t mean that sin entered through Eve, nor that she was responsible. Adam was responsible. God gave the instructions to him to carry out. It was his responsibility to pass them on correctly to Eve, which he apparently did not do.
And Mary? She is highly favored. And? Nobody is disputing that part of it. It would be an honor for anyone to be chosen to carry the Christ child. And nothing more than that. That doesn’t warrant the adulation heaped on her that the attributes attributed to her that have no Scriptural support.