In a hybrid project, the project manager is responsible for managing the expectations and requirements of all the stakeholders, both internal and external. The project manager also has the authority to approve or reject changes to the project scope, schedule, budget, and quality. Therefore, the team member should inform the stakeholder that the correct procedure for new requirements is to provide it directly to the project manager, who will then evaluate the impact of the change and decide whether to accept or reject it. This way, the team member can avoid being distracted from their work and maintain the productivity of the project. References:

Hybrid Project Management: What is it, Methodology & Software - Teamhood

What Is Stakeholder Management? - ProjectManager