The new release of ArcGIS Pro 2.3 mentions a new extension called Locate XT which allows point data to be extracted from unstructured datasets such as text and pdf files.
I was very interested to try this update and so I've updated my ArcGIS Pro to the 2.3 however in my AGOL (where I am a listed administrator) I am unable to find the option to assign myself this extension.
Note: I have all other extensions assigned and I have Advanced licence with access to all core extensions. I also checked My Esri to see if it a separate download but I could not find it.
Any idea how I may go about adding this extension?

What's new in ArcGIS Pro 2.3—ArcGIS Pro | ArcGIS Desktop
What is LocateXT?—ArcGIS Help | ArcGIS Desktop