Food ordering web & app with merchant side application

Hi developers,
I'm posting a web & app for food ordering and merchant side application.

Customer Side
Frontend: Flutter (App) and Flutter web
Backend: .NET API
Database: MS-SQL
Payment: Stripe

Merchant Side
Windows Application using Flutter
- Must get sound notification when new order received
- Must auto-print receipt when new order received
- Must able to manage food items, categories, add-ons (Modifier Groups)
- Must able to enable / disable orders
- Must able to change restaurant working hours
- Must able to change number of hours to prepare the food

Sample UI: https://ca.jollibeefoods.com

Let me know if you'd like to suggest or anything.