Hi Dan, as stated in my initial post, my intent is to open a map window which has been imported from a .mapx file. I'm trying to get this to work from a custom geoprocessing tool which is run in ArcGIS Pro.
In the GUI if I select Insert -> Import Map and point to the .mapx file, it adds the map to the 'Maps' section of the catalog, and opens the map window too.
In Arcpy if I use aprx.importDocument('.mapx file') it adds the map to the catalog but doesn't open the map window. I'm trying to work out if I can then open the map window using arcpy.
Hopefully that makes the intent more clear, thanks.