I don't see anything in your studies about "not due to racism". Plus your first paper says:

I don't see anything in your studies about "not due to racism". Plus your first paper says:

PRMRs for Black women at higher educational levels declined by over 1% per year, still remaining in excess of White rates.

So even at higher educational levels, something is causing a higher rate of black baby deaths. Plus this paper also suggests that fighting racism helps protect black babies:

Following on developments of the Reproductive Justice movement which began in 1994, the latter half of the twenty-teens saw the emergence of Black-led midwifery and community-rooted programs designed to address cultural dissonance, racism, and fragmented perinatal care. These models—alongside the work of the Black Mamas Matter Alliance (BMMA), SisterSong, and the National Birth Equity Collaborative (NBEC)—expanded national awareness of structural determinants and set the stage for subsequent policy reform. While formal impact evaluations of these were limited prior to 2019, early evidence from these programs suggests improved client trust, navigation of systems, and continuity of care.

So while I appreciate your linking in more evidence I think your conclusions, as you would say, "begin with a racial bias".