Here's one organisation that had a look at the Hamas casualty lists back in 2024.
And it seems the Hamas run health ministries misreporting of deaths during a conflict is nothing new!
https://henryjacksonsociety.org/publications/questionable-counting/"This report raises serious concerns that the Gaza MoH figures have been overstated. The data behind their figures contains natural deaths, deaths from before this conflict began and deaths of those killed by Hamas itself; it contains no mention of Hamas combatant fatalities; and it overstates the number of women and children killed.
Serious errors have been discovered on the Ministry’s lists of fatalities. These errors include a 22-year-old registered as a four-year-old, a 31-year-old registered as a one-year-old and several men with male first names registered as female – artificially increasing the numbers of women and children reported killed. The lists also include people who died before the war and people who died from attacks by Hamas rather than the Israel Defence Forces (IDF).
They likely include around 5,000 natural deaths per year, including cancer patients who were listed by the Ministry for hospital treatment after they had already appeared on fatality lists. Hamas also claimed hundreds of fatalities from attacks which turned out to be misfired rocket launches by Gaza factions.
It is indisputable that natural deaths which occur in times of peace would also occur during a war. The pre-war rate of natural deaths in Gaza is known from relevant mortality data presented by the Palestinian Central Bureau of Statistics, based in Ramallah in the West Bank.
Media reports claiming totals killed in Gaza by IDF action have not verified the figures cited and fail to account for the deaths of upwards of 17,000 Hamas and affiliated combatants as part of that toll.
This report also shows that the methodology of data collection by the Ministry of Health is not scientifically valid, and that
its reports from previous conflicts have also concealed combatant deaths.
