I think that the data Ukraine has on Russian losses is better than in any previous conflict. The drones are constantly flying over the battlefield recording.
I also think that Ukraine has significant political reasons for attempting to be reasonably accurate. They rely on NATO for money, weapons, and supplies. They need to provide an reasonably accurate representation of what they are doing with the resources to keep their suppliers happy.
It doesn’t need to be exact, just a reasonable estimate made in good faith.
Why google became the dominate search engine in the first place was because every other search engine was an ad infested nightmare fuel.
There is a limit of shit that people will put up with. Google is pushing that limit hard right now. Which is why I no longer use it.