The Appium Flutter Driver is a test automation tool for Flutter apps on multiple platforms / operating Systems. Appium Flutter Driver is part of the Appium mobile test automation tool. It is currently still under development and so is not supported in all scenarios:
As such Sauce Labs does not officially support or recommend use of the Appium Flutter driver
The driver is currently implemented for:
Android Emulators & iOS simulators; provided the app is a debug build.
Android Real Devices.
It is not yet implemented for iOS Real Devices
More details can be found here:
There is an outstanding feature request for Sauce Labs to provide support for this here: