Why are functions run in the module script file not in the window object?

The script file embedded directly in the HTML file, the functions contained in the window object. We can check with the following code.

    for(let i in window)
    {
        if ((typeof window[i]).toString() === "function" && !window[i].toString().includes("[native code]"))
        {
            console.log(i);
            console.log(window[i]);
            console.log("nn");
        }
    }

enter image description here

But when I run a function indirectly by importing it from module why isn’t it in there?
This is my file structure.

 1. index.html
 2. script.js
 3. moduleScript.js
 4. ModuleScript
    - moduleScript01.js
    - moduleScript02.js

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Event Listener</title>
    <script src="moduleScript.js" type="module"></script>s
    <script src="script.js"></script>
</head>
<body>
    <script type="module" defer>
        import * as moduleScript from "./moduleScript.js";
        
        console.log(moduleScript.moduleScript01.Level01(1,2));
        console.log(moduleScript.moduleScript02.Level02(1,2, 3));
        console.log("nn");
        
        for(let i in window)
        {
            if ((typeof window[i]).toString() === "function" && !window[i].toString().includes("[native code]"))
            {
                console.log(i);
                console.log(window[i]);
                console.log("nn");
            }
        }
        
        
    </script>
</body>
</html>

script.js

function Level01 (a, b)
{
    return a + b;
}

function Level02 (a, b, c)
{
    return Level01(a,b) - c;
}

function Level03 (a, b)
{
    return  Level02(a,b, 1) * 5;
}

function print ()
{
    console.log("Hello world");
}

moduleScript.js

export * as moduleScript01 from "./ModuleScript/moduleScript01.js";
export * as moduleScript02 from "./ModuleScript/moduleScript02.js";

moduleScript01.js

function Level01 (a, b)
{
    return a + b;
}

export
{
    Level01
}

moduleScript02

function Level02 (a, b, c)
{
    return Level01(a,b) - c;
}

export
{
    Level02
}