Although every time I try to pick flutter for something serious, I drop it after seeing thousands of issues on GitHub but the apps that I have built for myself - the development experience is undeniably amazing - only Visual Basic 6 had such pleasure back in the day and I am saying this after having played with Swing, Qt, MFC, plain Win32 API and later WinForms. And of course React Native.
The persistence with which Google is pushing flutter might make it from a toolkit to the toolkit, surpassing Qt in few years if they continued on this trajectory.