Where do I see what each team member has done in the accounts?

In Team, below the list of members, is the Team History: what each person did, on which account, in the same format as Meta's activity history.

• Use Search account, action, item or person to filter, the Person selector to see a single member, and the start and end dates for the period.
• Group repeated actions combines the same action done several times into one row.
• The history also shows changes made directly in Meta and Google: anyone who made changes in the native interface appears there, even if they're not on your team (Google reports changes with a delay of a few minutes).

Who can see it: the account owner and the Admin member with the Team (manage members and view history) permission. It requires a paid plan; the history does not appear during the free trial.