Joomla 4 Category Blog show subcategories articles

[barsdeveloper]

Hi, I'm overriding the category blog template because I would like to show articles inside subcategories, beside the subcategory name. To do this I'm overriding blog_children.php template and specifically, I'm interested in what happens here

joomla-cms/components/com_content/tmpl/category/blog_children.php

Line 45 in fe882f6

<?php echo $this->escape($child->title); ?></a>

IT shows the category title and that's it but I would like to print all the articles inside this subcategory, maybe print again the blog view of that category.

I know I can show articles from subcategories by setting Blog Layout > Include Subcategories to "All". The problem is that in this way the articles from subcategories are not inside a common HTML element but are all sibling of all the other articles from other categories.
The structure I would like to have instead is like this (note that articles from the same category are inside the same parent):

<div class="some-category-1">
    <h3>Category 1 title</h3>
    <div class="some-article-1"></div>
    <div class="some-article-2"></div>
</div>
<div class="some-category-2">
    <h3>Category 2 title</h3>
    <div class="some-article-3"></div>
    <div class="some-article-4"></div>
</div>

Do you have an example of how: given a category (like the highlighted line of code) I can print all articles inside that category, or I can print again this view for that category?
Thanks fo any help.