Lost over a year of step counts.

[cable311]

I lost my fitbit twice, so I switched to using my iphone X. This worked great but sometime last yr I must have lost the ability to sync with the fitbit app. I lost all my step counts going back to 2017. I am trying to reload my steps from 2018 at least. I get a bonus at work for having so many steps a year. I used my phone for 2017 with no problems. I was even able to retroactively load the last 3 months of 2017 that were recorded with my phone. When I try to sync my data today it only goes back maybe 20 days. 

I used sync solver in the past but it isn't helping this time.

[JohnnyRow]

Any steps that have gotten synced to the Fitbit app stay there, and can be seen by logging into the Fitbit app with the correct username/email. 

I'm not clear on how you were using your phone and where you were storing those steps.  Were you syncing the steps from your phone to Fitbit?