Worldometer is known to have fast data, not necessarily accurate data, and they get their data wherever they can find it, so they do not have standards of accuracy.
"Edouard Mathieu, the data manager of Our World in Data, stated that "Their main focus seems to be having the latest number [of COVID-19 cases] wherever it comes from, whether it’s reliable or not, whether it’s well-sourced or not."[6]
Virginia Pitzer, a Yale University epidemiologist, said that the site is "legitimate", but flawed, inconsistent, and containing errors.[6]"
The problem with that theory is the entire world uses the site. If they were not tracking some country well, someone would have made an issue of it — most likely to the website to get it fixed.
And they would have fixed it.
Only deaths really matter. Cases depend on how many felt like getting tested, incidental hospital testing, false negatives or positives.
But largely, dead is dead.