Because of delay in reporting. Their reporting is very delayed unlike in most of the countries so for "yesterday" you have only a small fraction of real cases, for "week ago", about half, and all of them only for month and more ago...
The other countries aren't reporting real-time data either, they just don't report the date of death.
who would be the ones that are reporting closest to real-time?
I’d guess it’s those with very few deaths.
New Zealand’s were mostly reported on the day. However some were identified as covid related further down the track, delaying reporting.
It's really not that serious compared the black death in the 1300's
I think that if you have to compare a disease to 1300's it is pretty serious