fetch response.text() returning undefined on iOS works on Android

Description

reading textual information from a http (not https!) fetch response is not possible on iOS. It always returns undefined.

I have added the required ATS excemptions in my iOS app like this:

<key>streamingsoundtracks.com</key>
<dict>
	<key>NSExceptionAllowsInsecureHTTPLoads</key>
	<true/>
	<key>NSIncludesSubdomains</key>
	<true/>
</dict>

React Native Version

0.71.7

Output of npx react-native info

System:
OS: macOS 13.3.1
CPU: (10) arm64 Apple M1 Max
Memory: 42.66 MB / 64.00 GB
Shell: 5.9 - /bin/zsh
Binaries:
Node: 16.18.1 - ~/.nvm/versions/node/v16.18.1/bin/node
Yarn: 1.22.19 - ~/.yarn/bin/yarn
npm: 8.19.2 - ~/.nvm/versions/node/v16.18.1/bin/npm
Watchman: 2022.09.26.00 - /usr/local/bin/watchman
Managers:
CocoaPods: 1.11.3 - /Users/pkursawe/.gem/bin/pod
SDKs:
iOS SDK:
Platforms: DriverKit 22.2, iOS 16.2, macOS 13.1, tvOS 16.1, watchOS 9.1
Android SDK:
API Levels: 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33
Build Tools: 28.0.3, 29.0.2, 29.0.3, 30.0.0, 30.0.1, 30.0.2, 30.0.3, 31.0.0, 33.0.0
System Images: android-22 | Google APIs Intel x86 Atom, android-23 | Google APIs Intel x86 Atom, android-24 | Google APIs Intel x86 Atom, android-25 | Google APIs Intel x86 Atom, android-26 | Google APIs Intel x86 Atom, android-27 | Google APIs Intel x86 Atom, android-28 | Google ARM64-V8a Play ARM 64 v8a, android-29 | Google APIs Intel x86 Atom, android-29 | Google Play ARM 64 v8a, android-29 | Google Play Intel x86 Atom, android-30 | Google APIs Intel x86 Atom, android-30 | Google Play ARM 64 v8a, android-31 | Google Play ARM 64 v8a, android-32 | Google Play ARM 64 v8a
Android NDK: Not Found
IDEs:
Android Studio: 2021.2 AI-212.5712.43.2112.8512546
Xcode: 14.2/14C18 - /usr/bin/xcodebuild
Languages:
Java: javac 18 - /usr/local/opt/openjdk/bin/javac
npmPackages:
@react-native-community/cli: Not Found
react: Not Found
react-native: Not Found
react-native-macos: Not Found
npmGlobalPackages:
react-native: Not Found

Steps to reproduce

fetch( "http://streamingsoundtracks.com/modules/ClearChat/common/log.php")
  .then(response => response.text())

Snack, code example, screenshot, or link to a repository

https://snack.expo.dev/bgysLbFYW

Start with the linked Snack and reproduce the fetch call against the stated HTTP URL on iOS and Android, comparing the response and response.text() behavior. Trace the React Native iOS fetch implementation and its response-body handling; done means the iOS call returns the textual response rather than undefined while Android behavior remains intact.