I am using it for cycling. The data is recorded correctly in the 1040 device but not uploaded to connect app. Why is this how to fix it
Assuming you saved then synced correctly and are not using multiple Garmin accounts, try a manual upload to Garmin Connect Web.
How Do I Manually Upload an Activity I Recorded to Garmin Connect?
If you get any message other than Import Complete, then there is a problem with the file. In that case, please attach it to this thread. We can take a look to see if it is repairable.