As an experienced full stack developer, I am confident that I can effectively tackle the permission issues you're currently facing within your Android and iOS application. My 5 years of experience span across various mobile app development platforms including Android, Ionic Framework and iOS Development. This means that I not only understand how to work with Capacitor 3 but also iOS, ensuring seamless integration between the two platforms.
In particular, I believe my comprehensive knowledge of Angular and mobile app permissions will come in handy here. Over the years, I have encountered and resolved numerous permission-related problems, making me well-suited to understand and rectify your specific push notification permission and write storage access permission requirements.
In terms of portfolio, my previous work demonstrates excellence in both design and function. This combination is vital to deliver a user-friendly permission request prompt for write storage access. Finally, your satisfaction is my number one priority. So let's get started on ensuring your users can enable/disable push notifications while providing them сonvenient write storage access prompts within your Android and iOS application!