Deploying your Capacitor iOS App to the App Store
Because Capacitor apps are normal native apps at the end of the day, the way they are deployed to the App Store is just like any other native app.
To start, consult the official Apple documentation on Submitting Apps to the App Store. See here for details on generating splash screens and icons for your app.
For a guide with some Capacitor-specific considerations, see Josh Morony's wonderful guide on the topic.