Subnavigation query

[Diewy]

We have the following navigation structure, as seen in the documention on Eager-Loading:

- Node 1
    - Node 1-1
    - Node 1-2
    - Node 1-3
    - Node 1-4
- Node 2
- Node 3
    - Node 3-1
    - Node 3-2
    - Node 3-3

Now, on each page of the second level, we would like to include a subnavigation. Including all nodes of that level.

So the result on each page should be:
Node 1: No subnavigation.
Node 1-1, 1-2, 1-3, and 1-4:

- Node 1-1
- Node 1-2
- Node 1-3
- Node 1-4

Node 2: No subnavigation
Node 3: No subnavigation
Node 3-1, 3-2, and 3-3:

- Node 3-1
- Node 3-2
- Node 3-3

I have it working with the following queries in my template:

{# Find corresponding navigation node in main navigation #}
{% set navigationNode = craft
      .navigation
      .nodes()
      .handle('main')
      .type('craft\\elements\\Entry')
      .elementId(entry.id)
      .with(['parent.children'])
      .one() %}

{# Get all the children of the parent navigation node #}
{% set parentNavigationNode = navigationNode.parent.children %}

 <ul>
      {% for sibling in parentNavigationNode %}
            <li>{{ sibling.getLink() }}</li>
      {% endfor %}
</ul>

But I was wondering if there would be an easier way to accomplish this.
Or, if there would be a way to optimize those queries.

Any suggestions or ideas are welcome.

Thanks!

[Diewy]

Wrong repository 🤦