Free will is not even a Biblical concept or doctrine, it is not even assumed in the Bible.
It is a man made concept that is sinful.
Do you speak of Biblical concepts and doctrines but do not believe them?
Consider this:
Gen 22:10 And Abraham stretched forth his hand, and took the knife to slay his son.
Gen 22:11 And the angel of the LORD called unto him out of heaven, and said, Abraham, Abraham: and he said, Here am I.
Gen 22:12 And he said, Lay not thine hand upon the lad, neither do thou any thing unto him: for now I know that thou fearest God, seeing thou hast not withheld thy son, thine only son from me.
This is a BIBLICAL example of freewill being demonstrated by ABRAHAM. When God told him to go sacrifice his son, he had a choice to either do what God told him, or to NOT do what God told him to do. He had the choice, this is FREE WILL being demonstrated by the BIBLE, which you claim to believe in.
Did God KNOW He would do it? If so, then what is it plainly written:
"FOR NOW I KNOW" Does this not clearly indicate that He did NOT know prior to Him actually fixing to do it? Yes it does. When the Word of God plainly says "NOW I know" That means He did NOT know before that very point that HE KNEW.
This generation would do well to forget everything any human has ever taught them about Biblical concepts and doctrines, and merely, like children believe the Word of God and what it says.
Not so with this generation who think they know Truths of God, solely based on their own understanding, something we are told NOT TO DO.
Pro_3:5 Trust in the LORD with all thine heart; and lean not unto thine own understanding.
Humans who go about to interpret the Word of God (as if they even had the authority to do so) are doing NOTHING but leaning onto their own understanding, adding their own meanings to the Word of God, and will 99.9% of the time come up with a false doctrine via their own understanding.
God reveals to whom God reveals His Truths to.