The US engages in domestic slavery too.

The 13th amendment has a very convenient loophole:

Section 1. Neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the United States, or any place subject to their jurisdiction.

It is one of the many reasons, perhaps the largest reason why African Americans are incarcerated at 6 times the rate of White Americans, on a national average.

Yet people still don’t believe systemic racism exists.