Deliverables are tied to the cycle of 1:1's. If the deliverables due in a 1:1 aren't completed or pushed before the Brief closes, the Deliverable will expire. All Deliverables can be accessed from the Deliverables submenu under both the "Team" and "Me" subsections.
Team Deliverables show the Deliverables between you and your direct reports. The Deliverables under "Me" will show the Deliverables that are between you and your direct report.