It seems google is testing the new form of Q&A rich results in mobile search. Saad Ak notices this over Google showing a forum header on top.
Also Read other Google News:
I saw "Forums" Carousel in Google SERPs.
I think it's new.
Sending to @rustybrick SIR. pic.twitter.com/o5yPSvgXTm
— Saad AK (@SaadAlikhan1994) June 29, 2021