Start with a calm, specific conversation with your manager. Show with facts how your extra work has moved a project forward, helped the team or contributed to a company goal, and then ask respectfully but directly for a clear path, whether that is a title, a raise or new responsibilities. Ask for a timeline and written next steps, and think about your own goals, including the skills you want to build. If nothing changes after a fair period, it may be worth exploring other options inside or outside your company.