Bing Search now lets you select text within the search results page and search for that selected text. I believe Bing was testing this for a while, and so has Google Search, but now it seems to be live.
This is what I see when I do a search and then select text, it gives me this little overlay that shows the selected text with a magnifying glass to search:
Clicking it generates a new search in Bing Search.
But Khushal Bherwani posted some screenshots of this on Twitter where the icon is way may visual:
Here are more screenshots from Khushal Bherwani:
— Khushal Bherwani (@b4k_khushal) June 21, 2023
Forum discussion at Twitter.