The speed and therefore distance is not valid when using a Smart Trainer that is paired to any biking apps. The Power and Cadence values are accurate but the Grade is showing zero and therefore the speed and distance are not accurate.
I have a Wahoo Kickr Core smart trainer that is connected to the Edge 1030 Plus.
I hope that the software engineers are working on uploading the Grade that the Smart Trainer is receiving from the biking apps onto to the Edge 1030 Plus as well!