I am an iOS developer having 4+ years of experience in the field of developing and uploading native iOS apps. I have handled all kind of AppStore rejections. I have upload 20+ apps to appStore with in-app purchase attached. Moreover I have a bachelor degree in the field of software engineering. My major subject in college was computer science. So I have been coding since 2017. I am sure that your work/task/project will be handover to you within the given/specified time or may be earlier.
Clear requirements and specification of the project. Moreover if you have a figma design then it would be much easier for the UI developmental.