May Allah reward you for all your good work and sharing your knowledge.
Answer:
Janaza salah is performed outside the musjid proper. It is not permissible to come out of the musjid during I’tikaf without a human need for example, answering the call of nature. Janaza salah does not fall in this category.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai
