Do I need to provide a work experience letter to justify my two-year study gap for my application?

No, a work experience letter is not strictly required to justify a two-year study gap, but it can strengthen your application if you were employed during that period.

If you were not working, you can explain your gap in your statement of purpose and support it with certificates from courses, volunteering, or other relevant documents. Clearly describe how you used your time and what you learned or achieved during the gap.