I stand corrected if I was wrong. Following the news over the years I had the impression that Dart (or Flutter) and Angular had been axed — with the decision reversed.
A Flutter and Firebase developer who goes by the name xeladu wrote that after a discussion with an unnamed “Google developer expert,” the developer wouldn’t recommend learning the language, but added it’s not time to port Flutter projects just yet.
“I’d rather say no to be totally honest. Only do it if you just want to play around. Then it will be fine,” xeladu wrote. “But becoming a serious professional Flutter developer could probably be a waste of time.”
https://techcrunch.com/2024/05/01/google-lays-off-staff-from...
I think maybe you might be mixing up some things here which is that there was once many years ago a version of Angular which was written in Dart which exists internally and powers AdWords but no longer exists publicly. Perhaps that is why you’re thinking of?