Care to share your sources? AFAIK, independent verification of the ongoing war is extremely difficult. From Wikipedia (hope you won’t accuse Wikipedia of being Russian propaganda):

and between 400,000 and 1.5 million estimated casualties (killed and wounded) during the Russian invasion of Ukraine from 24 February 2022 to November 2025

[…]Initially, the known number of Ukrainian military casualties varied widely due to the Ukrainian Army drastically understating its casualties

[…]Ukrainian estimates of Russian military losses tended to be high, while Russian estimates of their own losses tended to be low

[…]According to a researcher at the Department of Peace and Conflict Research at Uppsala University in Sweden, regarding Russian military losses, Ukraine engaged in a misinformation campaign to boost morale and Western media were generally happy to accept its claims, while Russia was “probably” downplaying its own casualties. Ukraine also tended to be quieter about its own military fatalities.

[…] Information on military casualties is a state secret in both Russia and Ukraine, while the Ukrainian government has been especially secretive, restricting access to demographic data that could be used to estimate its losses. In addition, Western intelligence agencies have been reluctant to disclose their internal calculations of Ukrainian military casualties for fear of undermining an ally. American officials previously said that Ukraine withholds this information from even its closest allies.

The number of civilian and military deaths is impossible to determine with precision.

This is not exclusive to Ukraine of course, Russia very much lies about casualties as a form of information war, my point is that taking either side’s claims seriously is incredibly media-illiterate.