Interestingly, you can also change your default search engine in Google's own Chrome app. Just tap your profile image to pull up your Settings. Select Search Engine and you'll see the following ...

Just because you use Chrome doesn’t mean you have to use Google. Learn how to invite Bing, DuckDuckGo, Brave, or even ChatGPT into your omnibox.

Navigate to Search Engine Settings: Go to the settings section related to search engines. Add and Set DuckDuckGo: If DuckDuckGo is not listed, add it as a search engine option.