Reproduction steps:
1. Create a new project
2. Switch build target to iOS
3. Add a Scene to build
4. Go to Player Settings (Edit -> Project Settings -> Player)
5. Add OpenGLES2 or OpenGLES3 graphics API
6. Switch target SDK to Simulator SDK
7. Build the project
8. Run and build it using Xcode with a simulated device (iPad or iPhone)

Expected result: the project builds and runs successfully
Actual: the project fails to launch with error "-> applicationDidBecomeActive() GfxDevice: creating device client; threaded=1 gfx device initialization failed"

Reproducible with: 2017.4.38f1, 2018.4.19f1, 2019.2.21f1, 2019.3.6f1, 2020.1.0a11
Not reproducible with: 2020.1.0a12, 2020.1.0b1
Could not test with: 2020.2 stream due to errors regarding menu item in the console when building in Unity, 2019.1, early 2019.2 because of multiple errors when building in Xcode ("previous definition metal support")

Notes:
1. Sometimes the application does not quit automatically
2. This issue is fixed in 2020.1 stream (Fix version 2020.1.0a12)