Business requirements and functional requirements docs for mobile app including flows

I am in need of a professional who can help me create business requirements and functional requirements documents including disgrams that can later used in figma for my mobile app project. The app will need to be developed for both iOS and Android platforms. I already have a detailed list of functionalities that I want to include in the app. The preferred format for the documentation is a Word Document. Use case , sequenxe disgram /flow is also key

Skills and Experience:
- Experience in creating business requirements and functional requirements documents for mobile apps
- Proficiency in developing apps for both iOS and Android platforms
- Strong attention to detail and ability to accurately capture and document specific functionalities
- Excellent written communication skills and proficiency in creating professional Word documents.