Google may be testing auto-expanding, auto-loading, the people also ask box so that it opens by default, without having to click on anything to expand it. Normally, the people also ask box is closed and to see the contents within it, you need to click on it to expand it. Not in this test.
Eric Hedekar shared this on Twitter and posted a screen shot. He confirmed he did not click on anything, he said " this is how the SERP appears prior to clicking anything on the SERP."
Here is that screen shot:
Have you ever seen this?
Forum discussion at Twitter.
Update: In 2024 this is still going on:
In place of a featured snippet or AI Overview, I got a pre-expanded PAA box. Kind of neat. pic.twitter.com/XK91HbPrKn
— Paul Shapiro (@fighto) September 26, 2024