how about apple store requires on sdk and xcode for submission

To submit an app to the Apple App Store, you need to use Xcode and adhere to the requirements set by Apple's SDKs. Here are some key points from the WWDC sessions that might help:

Xcode and SDKs: Apple's SDKs provide all the necessary tools to build apps for their platforms. Using Xcode, you can build apps with native SDKs, which is recommended for the best performance and integration with Apple features (Platforms State of the Union).
App Store Connect: You can upload your app builds to App Store Connect using Xcode or other tools like Transporter. App Store Connect provides a complete view of your app deliveries and helps manage the submission process (What’s new in App Store Connect).
Testing and Distribution: Xcode Cloud integrates with TestFlight, allowing you to automate the distribution of your app builds to testers. This can streamline the process of getting feedback before submitting to the App Store (Xcode essentials).
App Review Process: The App Store submission process includes a review phase. Recent updates have made it easier to submit various types of content, such as in-app events and custom product pages, independently of app version submissions (What’s new in App Store Connect).

For more detailed guidance, you might want to explore the specific sessions mentioned above, which cover the tools and processes involved in app submission and management.