This feature is not currently rolling out widely—it's available in search labs, which means you have to manually enable it. Anyone can opt in to the new Audio Overview search experience, though. If you join the test, you'll quickly see the embedded player in Google search results. However, it's not at the top with the usual block of AI-generated text. Instead, you'll see it after the first few search results, below the "People also ask" knowledge graph section.