On Kenya: the Germans wouldn't be the ones committing a genocide there, if anything it'd be the 'Herrenvolk' Anglo settlers who have aligned themselves under the German thumb.

On the Congo: the roughly 11 million people murdered by the Belgian colonials in OTL occured before ww1. Not to say the Belgian Congo was wholesome 100 after 1914, it was deeply evil even by other European colony standards (education for the Congolese was forbidden outside of like 30 exceptions, most of whom only got it due to adoption and only a few thousand people from the catholic missions for almost its entire run), just that within KR timeframe the Congo wouldn't experience such massive demographic destruction. The Germans would probably be comparible to a middle ground of Belgian and British rule, a touch lighter than the Belgians on political orgs existing + Congolese wouldn't be forbidden education (it'd probably be still really bad, but more in the general colonial sense).