Hi @Артем Чалов ,
Welcome to Microsoft Q&A forum.
Please follow this document: Greating API Keys for App Store Connect API to create an App Store Connect API key. And for connecting to the iPhone, there are two ways, one is pairing to Mac for iOS development, see this document: Pair to Mac for iOS development for details. The other is using hot restart, see this document: Deploy an iOS app using hot restart for details.
Best Regards,
Tianyu
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