During the Q&A section of John Mueller’s 09/17/2021 hangout, one webmaster asked about multiple schema structured data types and whether or not they can add them to one page.
The webmaster was curious about combining FAQ schema and Recipe Schema on one page.
John explained that you can put as much structured data on your page as you want.
He also said that when it comes to rich results, or, rather, what they show in the search results, Google tends to pick just one kind of structured data and focus on that.
If you include many different types of structured data on your page, then Google will pick one and just focus on that one.
He recommends if you want to include a number of different structured data types, you should focus on the type that you want, and don’t combine it with other things.
This discussion occurs at approximately the 23:37 mark in the video.