These two applications let you transfer logged workout data from the Fitbit API to your Toggl account.
/src/dotnetcore/fitbit.toggl.backsync adds all of the logged workouts for the past year.
/src/webtask.io/toggl-log-workouts is meant to be run daily on webtask.io to add the workouts from today.
See the post here: https://jcpretorius.com/post/2018/automatically-sync-fitbit-workouts-to-toggl