The dashboard linked is produced by @ragnarbjartur, but I'm the one who collected the officers's date of death.

Here's a visualization for the first 7 months.

It takes at least 5 months to get 90%+ of the data for a particular time period, by my estimate.

The troops:officer killed ratio was approximately 30:1 during the first month of the invasion and about 50:1 during the 6-7 months that followed. I'm also using known publication date of officer death that's not showing in the dashboard to make those estimates. I suspect the ratio increased to ~70:1 or perhaps even higher after the Kherson evacuation.