a) If your last sync was recent, you might have not waited long enough for the data to sync to Motion Connected (especially if the last sync was less than 24 hours ago) or you might have unintentionally linked the incorrect Fitbit account to Motion Connected.
b) If you do not have a recent sync but see activity data in your Fitbit app, you likely have two Fitbit accounts. We recommend confirming your Fitbit login on the Fitbit app because this is the account your watch is paired with. Depending on how your Fitbit account is set up, you can find either the Google account or the email address associated with it under the Settings (round profile icon in the upper right).Once you've confirmed your login credentials, relink to Fitbit on the Link Device page.
If you do not know your Fitbit account information or cannot get your data to upload to the Fitbit app or your Fitbit account you can contact the Fitbit team using their contact information found here for further assistance.