Hello and welcome to the Fitbit Community @Shannibear2003
Currently notifications is a known issue. You can find current information here on this thread: https://community.fitbit.com/t5/iOS-App/Stopped-seeing-notifications-after-updating-to-iOS-13/td-p/3...
I’m sorry but this is all the information I have on the situation. Good Luck to you.
Best Answer