If I can compare to react-native,flutter seems higher. Electron which is used widely used is the least search term.

Interesting enough, react-native and electron distinguish themselves in the Est coast and always miss the Wyoming or the Dakota's while flutter is more evenly distributed.

Which would mean that the higher flutter level might just be google cannot distinguish between the common name and the framwork.Yet the flutter trend is growing so it's certainly the framework or climate change side effect :D .

https://trends.google.com/trends/explore?date=today%205-y&ge...