Go to Calls and click History. There, you'll see a list of all your incoming, outgoing, and missed calls.
Note: Your call history is available if you have an Enterprise Voice or Business Voice license as part of your Office 365 subscription.
To call someone back, double-click their name in your call history list.
Tap Calls to see your call history and to access the Teams dial pad and the contacts from your mobile device. Call history includes outgoing, incoming, and missed calls associated with Teams and your Enterprise Voice phone number.
Note: The dial pad and your contacts are available when you have an Enterprise Voice or Business Voice license.