iOS gallery generates an invalid ios device

it tries to run with:
```
/usr/bin/xcrun simctl create "Storytale iOS Device" com.apple.CoreSimulator.SimDeviceType.iPhone-6s-Plus com.apple.CoreSimulator.SimRuntime.iOS-18-4
```

Fails with:
```
Unable to create a device for device type: iPhone 6s Plus (com.apple.CoreSimulator.SimDeviceType.iPhone-6s-Plus), runtime: iOS 18.4 (18.4 - 22E238) - com.apple.CoreSimulator.SimRuntime.iOS-18-4
An error was encountered processing the command (domain=com.apple.CoreSimulator.SimError, code=403):
```

but that combination is not valid. Please provide a way we can configure it, or have it use a valid simulator.

Start by locating the iOS gallery path that assembles the `xcrun simctl create` command and check the requested iPhone 6s Plus and iOS 18.4 combination against available simulator devices. Reproduce the failure, then make the simulator selection configurable or use a valid combination, confirming that device creation succeeds.

Written by the indexing model from the issue text.