Open ForeFlight Mobile and go to MORE > DEVICES. While connected to your Flight Stream, review the products listed in the Garmin Connext box. If some products appear to be missing, you should contact your avionics shop to discuss whether an installation or setting needs to be adjusted or whether you need to update the firmware on your Flight Stream.
You can locate a Garmin avionics shop here:
www.garmin.com/us/dealerlocator
Make sure your CAPABILITIES are as expected under MORE > DEVICES