Several months ago, Google tested displaying a left-hand sidebar filter on the desktop search interface. Google is doing something similar on mobile search, but now they are tucking the search menu items, video, images, maps, etc., in a left bar menu.
Shalom Goodman spotted this change and posted screenshots and a videocast of it in action on Twitter. Here is the video he created as a GIF:
I cannot replicate this, but I find the user experience to be cool. I suspect it will be confusing for the average searcher.
Here is more from Shalom:
— Shalom Goodman (@ShalomGood) February 16, 2023
Forum discussion at Twitter.