DDG is not any better than bing.
If you are willing to give your data to the "good guys" so they can make money with your data, you ultimately failed at protecting your privacy.
I do wonder how they get the money to plant these trees, hmm...
edit: oh, look at that! Even ecosia started getting into AI. Truly impossible for search engines not to get into AI territory these days, funny right? Even kagi did.
Afaik you can. The frontend interacts with the backend via an API so yes. It's possible.