Who is accountable for tracking the remaining work toward the Sprint Goal?

According to the Scrum Guide, "The Development Team tracks this total work remaining at least for every Daily Scrum to project the likelihood of achieving the Sprint Goal". The sprint goal tracking is by Dev team , while the goal at the product level will be tracked by the PO during sprint review. 

The Development Team is responsible for self-organizing and managing the work necessary to achieve the Sprint Goal. During the Daily Scrum, which is a daily 15-minute event for the Development Team to synchronize activities and create a plan for the next 24 hours, team members discuss progress and any impediments. The Development Team collectively tracks and manages the remaining work to ensure they are on track to achieve the Sprint Goal.

It's important to note that Scrum emphasizes collaboration and collective responsibility. The Scrum Team works together to achieve the Sprint Goal, and each role has its responsibilities in contributing to the success of the Sprint. The Daily Scrum and Sprint Review meetings are essential opportunities for the team to inspect and adapt their plan, ensuring they are making progress toward the Sprint Goal.