{% if page_obj.has_previous %}
    <a href="?page={{ page_obj.previous_page_number }}">← Назад</a>
{% endif %}

<span>
    Страница {{ page_obj.number }} из {{ page_obj.paginator.num_pages }}
</span>

{% if page_obj.has_next %}
    <a href="?page={{ page_obj.next_page_number }}">Вперёд →</a>
{% endif %}