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Hello @julieunruly, I hope you're doing well, thanks for joining the Fitbit Community. 
I appreciate your participation in the forums and I would like you to know that indeed, when you start a challenge or get invited to one, once you tap on the Challenge tab, you will be able to see your current challenges on the top of the screen.
Once you tap on the challenge, the next screen will show your friends's progress in the form of a leaderboard. In here you will also be able to share messages, cheers and taunts.
I hope this resolves your inquiry, if there's anything else I can do for you, please feel free to reply.
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