The Tasks tab in the conversation details contain a list of all tasks created in that conversation, both complete and incomplete. Each task contains the following information: the task title, the due date of the task, and the task assignees.
If a task has been completed, that task will disappear from the tasks list.
If you’d like to view the details of that task, tap on the task to navigate to the Details section. This will contain any information provided about that task, including the title, status of the task, the duration of the task, the task assignees, and the task description.