Excellent question - I do not know the answer.
I just assumed not given their no tracking/personal info policy. But since you asked I did some searching and found posts where DDG are saying they do not censor results.
While researching this answer I found this interesting article How to Live Without Google
But we know Google does via YouTube as explained in Who Will Google Silence Next?.
Plus Google's selective "Fact Checking" within search results is another form of censorship.
I have not observed either of these practices on DuckDuckGo
Thank you for looking the info up! Coincidentally, after I read your first unedited reply, I did a search myself and found the exact link you have now posted about DDG's censorship. Its a good page to understand why DDG's results are often not what one expects, or is used to.
Anyways thanks again for the informative post and reply.
Here, have an upvote and a follow :)
Ooops - thanks for letting me about that link error.
It is fixed now.