How to get a collection of related elements to a sorted collection of parent objects?

Question

Laravel

Good afternoon!
How to get a collection of related elements to a sorted collection of parent objects?
For example,
A ->hasMany(B)
Collection of parent elements: A->orderby(sortPosition).
I would like to get: a collection B of elements, as when passing elements in a sorted collection A.
.

Answer 1

A::orderby(sortPosition)->with('B')?

Answer 2

$posts = Post::with('comments')->get();
$allCommentsFromAllPosts = $collection->pluck('comments')->flatten();