Just chatted with support too and they are useless honestly. To add on to this, Peloton sync has not been working for a month or more. The peloton will send it to strava, but the strava sync to fitbit doesn't work either so this definitely feels like a fitbit issue but Google just tells you to reach out to them.
Pixel 9 Pro XL and Pixel Watch 3
I sync with a 3rd party app, LoseIt. It has been off and telling me I have an exercise bonus, I then tried to stop syncing some data, and now it says I already burned 589 calories from 8 steps. I reached out to Fitbit on the app, and have heard nothing, It's been broken since August 30th. They are about to lose me as a customer, there are lots of other devices out there 😞