Hermes experimental debugger does not open on iOS with custom build configurations

[sliptype]

Description

I have an iOS build configuration Staging.Debug that is a copy of Debug. The experimental debugger fails to launch when running this build configuration via:

react-native start --experimental-debugger

and

react-native run-ios --mode Staging.Debug

Output from metro:

info Launching JS debugger (experimental)...
warn No compatible apps connected. JavaScript debugging can only be used with the Hermes engine.

I've confirmed that the app is using Hermes:

The debugger launches properly when doing:

react-native run-ios --mode Debug

I did a little digging and see there is a check for the Debug configuration here and here, but I'm not sure if relevant.

Staging.Debug was created by copying Debug following these instructions. I would like to debug Staging.Debug because I need certain configuration for my staging app.

Steps to reproduce

1. git clone [email protected]:sliptype/RNRepro1.git
2. yarn i && pod install --project-directory=ios
3. yarn start
4. In another shell yarn ios
5. Launch debug menu with CMD + D or Device > Shake
6. Press Open Debugger

React Native Version

0.73.4

Affected Platforms

Runtime - iOS, Build - MacOS

Output of npx react-native info

System:
  OS: macOS 14.3.1
  CPU: (10) arm64 Apple M1 Max
  Memory: 142.52 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 18.17.0
    path: ~/.nvm/versions/node/v18.17.0/bin/node
  Yarn:
    version: 1.22.21
    path: ~/.nvm/versions/node/v18.17.0/bin/yarn
  npm:
    version: 9.6.7
    path: ~/.nvm/versions/node/v18.17.0/bin/npm
  Watchman:
    version: 2024.01.22.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /Users/sebastian/.rbenv/shims/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 23.2
      - iOS 17.2
      - macOS 14.2
      - tvOS 17.2
      - visionOS 1.0
      - watchOS 10.2
  Android SDK: Not Found
IDEs:
  Android Studio: 2021.3 AI-213.7172.25.2113.9014738
  Xcode:
    version: 15.2/15C500b
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.10
    path: /usr/bin/javac
  Ruby:
    version: 2.7.6
    path: /Users/sebastian/.rbenv/shims/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.73.4
    wanted: 0.73.4
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

Stacktrace or Logs

info Launching JS debugger (experimental)...
warn No compatible apps connected. JavaScript debugging can only be used with the Hermes engine.

Reproducer

https://github.com/sliptype/RNRepro1

Screenshots and Videos

No response