Get latest topic of a subcategory

Hello, sadly it does not. behave the same way.
Inside:

<script type="text/x-handlebars" data-template-name="components/categories-only">
....
    {{#each categories as |c|}}
...

I can use c.latestTopic
But inside after the above:

...
  {{#each c.subcategories as |s|}}
...

I can’t use s.latestTopic It doesn’t return anything