Customize eFood Delivery System for Catering

I have purchased the eFood Food Delivery System from CodeCanyon, which includes a Laravel backend/admin panel and Flutter customer and delivery-man apps. CodeCanyon project: https://codecanyon.net/item/efood-food-delivery-system-with-laravel-admin-panel-delivery-man-app-v10/30320338... (Budget: $250 - $750 USD, Jobs: API Development, Flutter, Laravel, Mobile App Development, MySQL, Payment Gateway Integration, PHP, Web Development, Website Design)