I have created youtube video which is about creating an UnSigned .ipa file using Xcode 11.x.x version without Developer account.
Title of the video : How to make an unsigned IPA without iOS Developer Account/Certificate on Xcode 11
To Disable Code Signing:
• GoTo /Applications then right click Xcode.app and click "Show Package Contents"
• SDKSettings.plist is located at /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS13.x.sdk
After modifying SDKSettings.plist file, restart your Xcode.
Note: Keep the backup of “SDKSettings.plist” in a different directory.
After generating unsigned .ipa file, replace SDKSettings.plist file with original SDKSettings.plist file and delete “CODESIGNINGALLOWED” key pair value under User-Defined settings.