Just read their privacy policy: https://duckduckgo.com/privacy.
In practice these documents don't really relate what the company is actually doing with your data. It's just something that has to be there on a website.
It's like ppl saying Telegram is private just because they say so.
Can you give one instance where Telegram lied about privacy?
It is very clear it is not e2ee on their website. They are private. Many privacy features on Telegram do not exist on other platforms.
Google and MS say that they do collect a lot of data. I indeed trust them here... What’s the point?