@ChildResource

Dialog Multifield Entries -> include as @ChildResource

ProductList.java

@Model(adaptables = SlingHttpServletRequest.class, adapters = {ProductList.class, ComponentExporter.class}, resourceType = ProductList.RESOURCE_TYPE,
        defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
@Exporter(name = ExporterConstants.SLING_MODEL_EXPORTER_NAME, extensions = ExporterConstants.SLING_MODEL_EXTENSION)
@Getter
public class ProductList implements ComponentExporter {

// [...]

@ChildResource
    private List<Product> productList;
}

Product.java

@Model(adaptables = Resource.class, defaultInjectionStrategy = DefaultInjectionStrategy.OPTIONAL)
@Getter
public class Product {
    @ValueMapValue
    private String productId;
    @ValueMapValue
    private String originalPrice;
    @ValueMapValue
    private boolean showStrikethroughPrice;
    @ValueMapValue
    private String additionalPriceText;
}

Loop manually

    private Product[] generateProducts() {
        List<Product> slidePojos = new ArrayList<>();
        Resource resource = request.getResource();

        final Resource slideCollectionItems = resource.getChild(SLIDE_COLLECTION_ITEMS);
        if (slideCollectionItems != null) {
            for (Resource slide : slideCollectionItems.getChildren()) {
                final Product slidePojo = new Product(slide.getValueMap(), request);
                slidePojos.add(slidePojo);
            }
        }

        return slidePojos.toArray(new Product[0]);
    }