Given the global distribution of the stakeholders and their high interest in the project (as indicated in the stakeholder power/interest grid), a dynamic feedback platform is the most effective way to ensure consistent engagement. By leveraging collaboration tools that allow asynchronous feedback, the team can accommodate stakeholders in different time zones, reducing the delay in obtaining feedback and helping to speed up the decision-making process.This approach ensures that all stakeholders can contribute when it's convenient for them, without the need for synchronized meetings, thus improving overall engagement and decision-making efficiency.

In Agile, estimates are initially based on previous experiences or expert opinions, but as the team progresses through sprints, they gain more insight into the project's actual complexity and the team's capacity. Agile estimates evolve over time based on the team's velocity, which reflects how much work the team can realistically handle. This is why the actual scope and timelines can differ from initial estimates. The agile lead should emphasize that the initial estimates were helpful for understanding feasibility, but the true estimates are refined continuously as the team gains more experience and understanding of the work, and as complexities or dependencies become clearer during each sprint.

The scrum master should first remind the team of the purpose and goals of each scrum event (such as the daily standup, sprint planning, sprint review, and retrospective) to ensure that they remain focused on their intended outcomes. The scrum master can then implement a policy that ensures discussions that deviate from the scope of the event are stopped. This approach keeps the team on track, prevents time-wasting conversations, and helps maintain the efficiency of the events.
This method empowers the team to stay focused on what is essential for each event and encourages self- management while still providing room for relevant discussions. In doing so, the team can achieve the desired outcomes of each scrum event without unnecessary delays.