How to install flutter
https://docs.flutter.dev/get-started/install
Get the Flutter SDK
$ cd ~/development
$ unzip ~/Downloads/flutter_macos_2.10.2-stable.zip
Add flutter to your path:
export PATH="$PATH:`pwd`/flutter/bin"
Run Flutter doctor to diagonose any problems:
flutter doctor
At least for running the app in web, you do not need xcode, or android studio.