Why is my Swift app created text file visible/accessible in the simulator, but not the iOS device itself?

I would like my Swift app to be able to write a file (myDebug.log) that is viewable by a user on their iOS device.

The code I am using is below. While the code can be cleaner and more efficient, right now my issue is being able to access/view the file from the iOS device.

I can see the file if it is created in Xcode's (13.4.1) simulator.

I can see the file when I look at my iPhone's container for the app using Xcode. Although I cannot access it there, if that has any bearing.

However, I cannot find the file using iPhone's File app. Which is the bottom line, I would like the log to be accessible from iOS devices outside of at the development setting.

My first guess was that I am choosing the incorrect directory? However, I can see it on the "Documents" folder of my simulator. So am still unsure as to where my error is.

In the code below I have also tried using the allDomainsMask but that made no difference.

Would appreciate any advice on what I am doing incorrectly.

//setup on viewDidLoad
if debugLog {
   debugFileURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0].appendingPathComponent("myDebug.log")
}

//record an event
func debugLog (msg: [String]) {
    
    ...exit if not logging, or no valid URL...
    ...prep text...
    
    if let handle = try? FileHandle(forWritingTo: dbClass.debugFileURL!) {
        handle.seekToEndOfFile()
        handle.write(text.data(using: .utf8)!)
        handle.closeFile() 
    } else {
        try! text.write(to: dbClass.debugFileURL!, atomically: false, encoding: .utf8)
    }
}