Array not paginateable (Shopify)

I've combined articles from all blogs into an array and I'm trying to paginate them but I'm getting this error "Liquid error: Array 'featuredArticles' is not paginateable."

{% assign featuredBlogs = "All,Products,Health,Training,Nutrition" | split: "," %}
    {% assign featuredArticles = false %}
    {% for featuredBlog in featuredBlogs %}
      {% if blogs[featuredBlog].articles %}
        {% if featuredArticles %}
          {% assign featuredArticles = featuredArticles | concat:blogs[featuredBlog].articles %}
        {% else %}
          {% assign featuredArticles = blogs[featuredBlog].articles %}
        {% endif %}
      {% endif %}
    {% endfor %}
    
    {% if featuredArticles %}
      {% assign featuredArticles = featuredArticles | sort:'published_at' | reverse %}
          {% paginate featuredArticles by 5 %}
            {% for article in featuredArticles %}
            <a href="{{ article.url }}" class="article-preview">
            <div class="article-pi-wrap">
              <img src="{{ article.image | img_url: 'medium' }}" />
            </div>
            <div class="ap-bottom">
              <h5 class="ap-title">{{ article.title }}</h5>
              <p class="ap-excerpt">
                <span>{{ article.published_at | date: format: 'abbreviated_date' }}</span>
              </p>
            </div>
            </a>
            {% endfor %}
            {% include "pagination" %}
          {% endpaginate %}