God will save all and everyone whom He knows would believe.
God is not going to save anyone he knows does not want Him.
If God were obligated (in that sense) He would have to save those who go through the motions, yet He knows they do not want to believe.
That is really basic stuff. Yet?
We just do not know what God knows about the person.
That is why it says... in
Romans 9:15-16.
For he says to Moses,
“I will have mercy on whom I have mercy,
and I will have compassion on whom I have compassion.”
It does not, therefore, depend on human desire or effort, but on God’s mercy.
Salvation does not depend upon human desire or effort.
You can beg God to save a relative whom you love.
Your desire will not make God save that person if God knows they want no part of Him.
God will have mercy only on those whom He knows would want to know Him.
On the flip side of that coin?
People may desire that God send some evil person to Hell.
But, God will have mercy on him like he did with Paul who was murdering Christians.