Yes. There's only 3 major browsers. Chromium (Chrome), Firefox, WebKit (Safari). Nearly every other webbrowser is a fork of one of these, most are forks of Chromium, including Opera. As such, most webbrowsers will be affected by the change.
DuckDuckGo's webbrowser is somewhat unique, in the sense that it isn't its own browser at all. It's a "WebView", using the OS built-in webbrowser with a coat of paint.
This means it's Blink/Chromium on Android and Windows, and WebKit on iOS and macOS.
DuckDuckGo uses the default rendering engine of whatever OS you use it on, so webkit (also used by safari) on macOS and iOS and blink (also used by edge and chrome) on windows and android
even if it uses the same rendering engine on some platforms, it’s not based on chromium, so it’s not a chromium browser
You really don't see a problem installing software from an authoritarian regime that spies on basically everyone and everything and has 0 privacy protection?