During last January's ceasefire,
I noticed that the number of bodies recovered in Gaza fit a pattern inconsistent with Hamas claims, repeated and amplified by the UN and NGOs, that there were some 11,000 missing bodies buried under the rubble.
The number of bodies being recovered kept going down week over week, even though there was plenty of heavy machinery in Gaza to move rubble.
After the early 2025 recovery (which totaled some 900 bodies) didn't bear out Hamas statistics, UN agencies largely avoided quoting Hamas on the matter, instead saying "many bodies" still buried. In other words, the NGOs know Hamas lied but didn't call it out.
And now we can prove yet again that Hamas lies about Gaza casualties.
Here is a chart of the number of bodies recovered since the ceasefire according to the Ministry of Health in Gaza Telegram channel:

The dramatic drop after the first couple of days show that either Gazans are not prioritizing finding bodies (unlikely, given families who would be insisting on it) or that the bodies were never there to begin with.
Keep in mind that Israeli airstrikes on buildings since November 2023 have all been following evacuation warnings, so the number of bodies buried under rubble since the early days of the war would almost exclusively be Hamas terrorists who were using buildings as cover as they shot from empty areas of Gaza at IDF troops who would call in airstrikes. So most of these bodies are probably Hamas anyway.
I would expect that there may be as many as several hundred Hamas terrorists buried or suffocated in bombed tunnels that are very deep and beyond the reach of ordinary earth moving equipment that Hamas would want NGOs to see, but none of them would be civilians.