DDG (uses Bing index) censored a lot of non-mainstream portals both at socialist left and conservative right spectrum, pushing Western neoliberal agenda websites that run Washington/Brussels propaganda. This was done during Ukraine conflict and seems to be a continuing theme, probably even for Israel genocide. Some call DDG as a "diet Google", since Google/Bing have done the same thing since long ago.
I am not sure how Kagi deals with this problem, since it is a different style of search engine, putting users in their own search bubbles, and has its own indexing to begin with.