They also downgraded results from sources with 'Russian disinformation'

Duck duck go's comment:

"The primary utility of a search engine is to provide access to accurate information. Disinformation sites that deliberately put out false information to intentionally mislead people directly cut against that utility. Current examples are Russian state-sponsored media sites like RT and Sputnik. It's also important to note that down-ranking is different from censorship. We are simply using the fact that that these sites are engaging in active disinformation campaigns as a ranking signal that the content they produce is of lower quality, just like there are signals for spammy sites and other lower-quality content. In addition to this approach, for newsworthy topics we're also continuing to highlight reputable news coverage and reliable 'instant answers' at the top of our search results where they are seen and clicked the most. We're also in the process of thinking about other types of interventions."

https://www.pcmag.com/news/duckduckgo-to-down-rank-sites-associated-with-russian-disinformation