The Wecomplish platform makes it clear who is assigned which roles, and which responsibilities those roles entail.
However, that does not automatically ensure that people actually practice those responsibilities. In some cases their familiarity might be low, in others they might not have set aside sufficient time to practice the responsibility.
As team leader it is your responsibility to ensure that your team members carry out their responsibilities in a manner which you see fit and consider sufficient based on their current role maturity and the overall priorities of the team.
Use the role list of team members if you need help remembering the responsibilities each individual is expected to practice, and Expectations in focus to communicate which specific expectations you would like people to improve their familiarity with or practice more.