The US counts this differently, when you account for this US maternal mortality rates are similar to other western countries. By counting more the US hopes to find and then correct issues that other counties are ignoring.
The article specifies that “researchers found that in 2022, 22.3 US women per 100,000 died either during pregnancy or within a year of giving birth” so I’m not really sure what the first response is on about “counts mortality differently” 🙄