Also Jax is NEVER forgiven for what she did, she is simply explained. A life of repressing her true self due to her parent's abuse caused her to become destructive to herself and the others around her. Which does not justify Jax's actions, but does explain them.
The song is not used here to be about an abuser being forgiven. I believe that the song is used here to represent Jax finally accepting that she is trans in her last moments, the baby daughter being born IS Jax.
taking the song about a black man singing about his newborn baby and re-contextualizing it to be about an abuser getting forgiven with no consequences, AND THEN releasing that episode on Juneteenth is crazyyy