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 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
Are Opera and it's derivatives affected by this?
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.
What's duck duck go's browser?
depends on the OS!
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