javascript fix

Hello! First of all, these are the technologies that my Application uses, and they have some errors that I need to correct to make it work 100%. With the Dahsboard: Application: Flutter. In the Back End Go as Server Language. On the front-end of React, HTML5, CSS, and Javascript, that's finally what React becomes. The error: The application a digital menu for restaurants, the problem is that when you order a dish from the Application (Only for iPad iOS), it gives you suggestions, for example it suggests, with your order, also order an Orange Juice , but when it is modified from the Dahsboard, suggesting a beer, for example, it is not modified in the application. They always show the same suggestions, and when modifying the suggestions in Dahsboard, the suggestion in the Application does not change. Extra: I also need to update the Certificate that Apple requests every year, this certificate expired and I don't know how to do it. Conclusion; I need my application to be working 100% without errors, and with the updated certificate in the Apple Store. Please, if you meet the requirements you can write to me, otherwise no please! For more details you can write to me! Thank you!