Here’s how to submit your app to the Apple App Store:
- Create an iOS distribution provisioning profile and distribution certificate
- Create an iTunes Connect record for your app
- Archive and upload your app using Xcode
- Configure your app’s metadata and further details in its iTunes Connect record
- Submit your app for review
- Check on the status of your app
Read more: https://instabug.com/blog/how-to-submit-app-to-app-store/
https://developer.apple.com/app-store/submissions/
Read more: https://support.google.com/googleplay/android-developer/answer/113469?hl=en