Google is once again testing infinite scroll on the mobile search results. We've seen numerous tests of infinite scroll, including on desktop results. The mobile search results right now have a "more results" button to load more results but in this test, the button is not needed.
Here is a GIF from Brian Freiesleben of this new mobile infinite scroll test in action from Twitter:
Here is Kelly who spotted it also:
It’s possible I haven’t noticed the experience, tbh. But what feels odd is that sometimes I swear I’m getting what would be traditional page 1 & page 2 together before hitting any load more action. pic.twitter.com/URBmCHRQqK
— Kelly (@_KellyDubs) February 5, 2021
Forum discussion at Twitter.