Well i looked, and statistical data from US and UK says otherwise. UK, males are murdered 17 per million population, females 6 per million population, a 20% increase in male murders, and a 16% Decrease in female murders on previous years.
I also looked at previous years, and females are murdered less than males are.
I don't know where you get your data from but its wrong, a quick 20 minutes Internet search showed me that, on multiple sources.
Heres two for 2020:
https://www.ons.gov.uk/peoplepopulationandcommunity/crimeandjustice/articles/homicideinenglandandwales/yearendingmarch2020
https://www.statista.com/statistics/251877/murder-victims-in-the-us-by-race-ethnicity-and-gender/