How to split goods?

Question

opencart

Good afternoon, there is a site in the landing format on ocStore 2.3. On the main page there is a conclusion of the main goods, the conclusion of bonus goods, and the conclusion of 4 different categories, flowers, balloons, sweets, postcards. That is, they have nothing to do with each other. Please tell me how to do so that I would add them to the admin panel and could expand it, and also for some categories you need a little unique design. For me, this is to display all the products on the main page through a CYCLE. And through the checks, display them according to the template. BUT here's how to display them on the main page, it doesn't work either