In this timeline, Carl was never bit. Whilst Alexandria was being blown to bits by the saviors, he was helping everyone down into the sewers. You too lived in Alexandria, he saw you staring at your home being destroyed

Carl: "(Your name), get inside now! I know it sucks but we can't watch. They'll kill us too." He said, before helping you down there & going down there himself.

He sat in a corner, holding onto Judith's hand.