从MongoDB中的Document中检索深层嵌套的子文档（PHP）

Question

I have a collection similar to this:

{
'_id': ObjectId("5bc74908f2377d746g1e9983"),
components:{
    0: {
        index: 21,
        abc:22,
        sim: [
            {s_index:23},
            {hyx:45}
        ]
    },
    1: {
        index: 21,
        abc:22,
        sim: [
            {s_index:23},
            {hyx:45}
        ]
    }
   }
}

I am trying to output:

{
    index: 21,
    abc:22,
         sim: [
             {s_index:23},
             {hyx:45}
        ]
}

But with the following query:

$Result = $templates -> findOne(
[
    '_id' => new \MongoDB\BSON\ObjectId("5bc74908f2377d746g1e9983")
],
['projection' => ['_id' => false, 'components.0' => true]]
);

I am getting the output as:

{
   components:{
    0: {
        index: 21,
        abc:22,
        sim: [
            {s_index:23},
            {hyx:45}
        ]
    }
    }
}

Is there any way to get the desired output? I am trying to retrieve just the value of component.0 but I am getting the complete path in the document.

sim is an array of objects. What if I just want to retrieve a particular object in sim not the path from components to sim. Can this be done?