
So you've logged your food data in another app and that data doesn't sync to Fitbit....
Sadly, Garmin Connect does not send over nutrition data to Fitbit. But that didn't stop me from taking a picture of the food I did log in Garmin Connect. Gemini's pretty good at reading.
Edit: you should also be able to read recipe pages in the same way. Be sure you keep in mind how much a serving is.