It's good to remember that statistics is a garbage in, garbage out process. The data you have almost never measures exactly the right thing. Usually it's something related to what you want, and you have to be careful when drawing conclusions.

As it became obvious during the pandemic, death reporting is all about bureaucracy. Even in developed countries with the administration working more or less normally, it can take weeks or even months for deaths to register. Some deaths are reported multiple times, some are not at all (until someone notices something is wrong), and sometimes the reports from a certain source are not included in the total, often due to technical/communications issues. And the process is certainly not FIFO.

It could be that the reported numbers from Gaza are fake. Or it could be that the number of death reports the administration can process every day is relatively stable. When there are more deaths, there will be more lag in reporting. And when you see something weird in daily death reports (not daily deaths), it could reflect the internal structure of the administration.

Also, deaths are usually underreported in urban warfare, sometimes significantly so. For example, most estimates of civilian deaths in the Battle of Mosul are between 10k and 40k.