If you use Expo and EAS build service to build your application, to disable Ipad support you need:
Increase the version and the build number in app.json (expo.version and expo.ios.buildNumber.
Set supportsTablet to false in app.json (expo.ios.supportsTablet)
ref
https://stackoverflow.com/questions/72627677/expo-remove-ipad-support-on-non-published-app