Flutter mobile app edit

Background

i bought a muti-restaurant single owner app. This app allows a single owner to manage restaurants across town.
on the customer app, each restaurant can be viewed and its menu seen and ordered
Changes
now i want to change the code slightly, changing it to a multi-restaurant multi-owner app.
change the owner app to chef app, therefore multi-chef app.
I want each restaurant widget to simply be a list of all the chefs working in that restaurant,
each chef app, contains menu items

changes to customer app
1. restaurant widget code is changed to be a list of all the chefs who cook for that restaurant
2. chef widget has chat bubble, that allows customer chat with chef
3 chef widget lists all chef menu and customer can order
4. chef slider-showing chefs

changes to owner app
1. Change to multi-owner app
2. chat widget to allow chef chat with customers
3. loan widget-to allow chef apply for loan (form widget)
4. insurance widget- allow chef insure against fire (form widget)
5. Delivery widget allows chef request for dispatch rider to come pick up from restaurant and deliver(form widget )
6. Wallet widget for chef to make transfers into wallet.
7. flutter Inventory management widget integrated (so that any item uploaded to menu by trader can be manged by chef)

changes to database
1. chefs can register
2. Table chef
2. chef can belong to restaurant
3.chef can belong to food category, e.g mexican food,
indian food or italian food

Admin/Laravel backend
1. admin can see chef loan request
2. admin can see chef insurance request
3. Admin can see delivery request