Is there any way in ArcGIS Online to find and select the two farthest points within a map or to find the farthest point from a selected point on the map and find the distance? Example, select Los Angeles as a city point and find the farthest city that you have a point for on the map and show the distance. Or even select Los Angeles as a city point and find the farthest point on the boundary of the contiguous US and create a specific point. Maybe even create a buffer layer that extends to that farthest point. I know there is a nearest function, but don't know how to find farthest if it is even possible currently. If not would there ever be an incentive to add a function for that?
My initial research indicates that a tool which would directly calculate the farthest point from another existing does not exist. A few posts that I located on GIS Stack Exchange reference zonal tools, particularly the Zonal Statistics, which is a part of the Spatial Analyst toolbox. Please see the links below for more information.
Overview of Zonal Toolset: https://pro.arcgis.com/en/pro-app/tool-reference/spatial-analyst/an-overview-of-the-zonal-tools.htm
I believe that a calculation like this would require multiple tools and/or tools that involve raster calculations beyond the default, from what I understand.