Añadiendo número de publicaciones en cada categoría

To clarify: You want the number of posts per category, not the number of topics per category?

Either way I can say that it certainly is possible.

I am personally quite new to ember.js so I can only offer this in theory at the moment.

import Component from "@glimmer/component";
import Service, { inject as service } from "@ember/service";
import { action } from "@ember/object";

export default class CategoryStats extends Component {
  @service site
 
  categoryId = **input category id number**;
  postcount = this.site.categories[this.categoryId-1].post_count;

}

Because each category does keep track of the total number of posts, and the site keeps track of each category in a categories array, you could add an ember component like the one above and then output the {{postcount}} to the template from the Custom Header Links, or wherever else you’d like.

However, I am currently too dumb to know how pass in that categoryId value as an input, so I will have to punt this to someone smarter or more experienced.