Hi Smid!
First, broadly speaking, the Bible doesn’t record all of God’s dealings with individual humans throughout human history—not enough pages and tangent to the Bible theme. It only focuses and recounts some dealings. Take for example Job who was not a Jew which is in the Bible record but why not others too that are not in the Bible. Of course we don’t know but it is logical.
I’m trying to find the verse. But says something like you were the last of all the people or the last of all the nations.
Take for example Adam and Eve, he gave them a chance. He could have created somebody else that would have been obedient. Esau didn’t want it. Look at king Saul too. The evidence is that God is fair but if you loose the opportunity it’s on you. The faith that Abraham showed was so huge that he swore by himself to bless him and his descendants. Was Abraham his first choice? We know that God first chose Saul. David was his second. Finally God rejected natural Israel and selected Gentiles to be part of the seed with Jesus.