Google has moved the feature to "suggest an edit" from in the main mobile list view of a local listing to in the three vertical dots bar. So it is a bit harder to find now but it now takes up less space in the local panel.
This was spotted by Amy Toman and posted on Twitter. I think it is new, and the desktop version, I do not believe, has not changed.
Here is what it looks like now:
Here is what it looked like a few years ago:
It is now a lot harder to find, which may or may not be a good thing?
Forum discussion at Twitter.