I wore a different device for one day recently (Fitbit) when my friend was wearing my Fenix 7 to determine whether he would like to upgrade. In the past, I have been able to delete the daily step data on Garmin connect (the steps which my friend got) and replace them with my step data from the Fitbit using the upload button on Garmin connect.
I have tried this today. Whilst the upload says that it is successful, the Fitbit steps do not show on my dashboard as there is some Garmin data linked to that day (I believe Garmin data takes priority).
So I am just wondering if there is still a way to remove a days step data and replace it with data from a Fitbit by uploading a CVS file with the Fitbit data.