https://www.pravda.com.ua/eng/news/2022/11/30/7378622/
"The European Commission admitted the mistake regarding the figures of the losses of the Ukrainian military, which allegedly amounted to 100,000 people killed, as Ursula von der Leyen, the head of the European Commission, announced on 30 November."
The given 'best estimate' is that Ukrainian casualties are probably equal to Russian : that is troops in general, not officers alone.