Doesn't this contradict that you can only have one or the other?
"Multiple items on a page
Multiple items on a page means that there is more than one kind of thing on a page. For example, a page could contain a recipe, a video that shows how to make that recipe, and breadcrumb information for how people can discover that recipe. All of this user-visible information can also be marked up with structured data, which makes it easier for search engines like Google Search to understand the information on a page. When you add more items that apply to a page, Google Search has a fuller picture of what the page is about and can display that page in different search features.
Google Search understands multiple items on a page, whether you nest the items or specify each item individually:
- Nesting: When there is one main item, and additional items are grouped under the main item. This is particularly helpful when grouping related items (for example, a recipe with a video and reviews).
- Individual items: When each item is a separate block on the same page."
https://developers.google.com/search/docs/guides/sd-policies#multiple-items