That's like ~40% of the deaths in the current gaza war, except over just 2 days instead of 2 years.
https://en.wikipedia.org/wiki/Babi_Yar
The Nazis were still killing people in other places at the same time, so the deadliest day is probably much much higher.
The scale of the Holocaust is hard to imagine. Even just looking at very specific suranmes, there are 23,000 killed with the surname Rosenberg, 12,000 with the surname Adler...
https://collections.yadvashem.org/en/names/search-results-na...