Hi Alan,
Thank you for getting in touch with us, we do appreciate your time.
Unfortunately the functionality that you have described is currently not supported, however, we have added it to our feature request list, thus we may look into this in the future as it is quite a nice feature.
In the meantime, you could try enabling the “Show center point as an icon” store locator setting as this will place a marker pin at the location that was searched. This would then allow the user to see if the location searched is within the respective polygons on the map.
I hope this helps?
Kindest Regards,
Matthew