Actually, it was already there, but still it was not displaying the radius search options, so I did experiment. II uninstalled the plug-in and completely deleted it and clear out all the caches from cloud flair as well as site cache. Reinstalled it, so it started displaying the radius option now. The problem was what I diagnosed is. I manually uploaded the coordinates which was creating the issue.
But one issue, I am still facing that on the Product item page, the google maps on right side are showing maps. but radius map at the bottom of description not displaying the map until unless we click on the Related listings in your area | How far is it? Show listings in my area. If there is something in settings of the plug-in, so please let me know.
On some listings, it is displaying map on both locations. So I think it is resolved now because maybe some user don't upload the location in their listing. That is the reason it is not visible on both the maps.
Cool, so you should now get it into search sidebar, if it's in search_form hook (hooked)