Google Tests Accordion Tabs for Wikipedia Table of Contents in SERPs

Look like Google might be testing a new layout for Wikipedia entries in SERPs. I am not 100% if this is new but a quick search and I did not find any references to it. It appears to be pulling the sections from the Wikipedia Table of Contents section. Feels like a spruced-up version of site links.

Sample Query: Try searching for Sample Query on Mobile or Desktop. I was able to trigger the result from USA.