Requirements Phase

I want to develop a digital solution to launch a new business. I need a specialist to develop a deliverable (a document) that will provide all the required information, in the correct format, that I can give to one or more development platform specialists so they can review it to determine if some low/no code platform ([login to view URL], Appgyver, Appypie, Flutter, Squarespace, Big Commerce, Shopify, WordPress / WooCommerce etc.) can be a suitable development platform for my needs. This first project does not require someone who is a specialist in all of the above low/no code platforms - this project requires only that a person be capable of developing a business/functional requirements document/deliverable that can be used by individual platform specialists, to understand my needs and to supply estimates about developing my solution on their respective platforms