Yes, LA has a high maternal death rate. More often than not it's a black woman who dies, but Cassidy is basically saying if they don't include black women (blacks make up a third of LA's population), the numbers don't look as bad.
https://www.businessinsider.com/gop-senator-la-outlier-maternal-death-rate-skewed-black-women-2022-5
Also, sorry for replying late. I had things I needed to do today.