Checklists are the reason that California has 4.5 maternal deaths per 100k live births, while USA as a whole has 26.4. [0] If hospitals cared about this sort of thing, there wouldn't have to be state regulations for this. If states besides California cared about this sort of thing, they'd have the regulations too.
[0] https://www.usatoday.com/deadly-deliveries/interactive/how-h...