This app was mentioned in 5 comments, with an average of 1.40 upvotes
It sounds like you are on Android so you might want to look at Fithub to see if that works for you.
https://play.google.com/store/apps/details?id=com.gabilheri.fithub&hl=en
There are also some other ones to look at:
https://fitnessconnect.io/ https://github.com/praveendath92/fitbit-googlefit/ https://www.fitnesssyncer.com/
For those on iOS, I've had very good luck w/ Sync Solver.