We did that with one guy after month 3, the guy accepted and started Flutter course, etc. He quit the job on month 5 arguing he disliked Flutter and Dart.
i’ve trained on flutter for over 8 months and pushed an from design to app on the app store and built the api in dart as well.
i am one of those weirdos who likes it but nobody is hiring so i am rebrushing back up on javascript and react native. one area i would love to see is json being automatically accessible just like in javascript, also their routing in flutter needs work. it’s not for everyone but it has a ton of potential if some things get change