this is a great topic, one of the paradoxes for us as believers for sure. is free will in the Bible? I believe that it is.
In Numbers 20, when Moses and Israelites were in the desert and out of water, God commanded Moses to speak to a rock before the assembly of Israelites and said that water would pour out from it. When he didn't quite follow that instruction and struck the rock out of anger, Moses was denied the ability to enter the promise land; he would only see it.
it's pretty clear that Moses was not predestined to screw up, he was given a choice.
in 2 Chronicles 32 when Hezekiah was going to die, he prayed to God to live longer, God granted his wish.
there are numerous examples of free will throughout scripture. without the opportunity to screw up, and screw up permanently what need to we have for redemption through Christ?
I've heard it said like this, no one will be in hell for their sins, they'll be in hell for rejecting the provision God has made for their sins.
man's sovereignty is a gift from God, the best thing we can do with that gift is to give it straight back to the one who gave it to us.