God says this to Jeremiah before Jeremiah has done anything or been anyone’s choice. Before I formed you in the womb is before your parents even met you.
God’s knowing of you didn’t start when someone decided to keep you, it started before you existed. Set apart means chosen on purpose, not an accident.
This doesn’t erase what happened, a parent’s absence is a real wound and it’s allowed to hurt. But the story of your worth didn’t start with them.
It started with God, before you could do anything to earn or lose it. So if you’ve spent your life feeling like an accident, this verse is God correcting the record. You were known. You were set apart.