It’s a tough job to keep a track of deaths in any major pandemic.
Covd-19 is no exception.
There are genuine difficulties in data collection from inaccessible habitation.Some poor countries do not have the infrastructure for data collection. Some deaths go unverified.Then, there are political compulsions for a nation’s image.Overzealous subordinates under reporting to please their higher ups
So, we have different fatalities reported.
The details of one such article are worth pondering.
https://www.ha-asia.com/the-math-of-death-calculating-fatalities-in-a-pandemic/