How To: View the World Imagery basemap metadata in ArcGIS Pro (esri.com) the non-python way
and this is all that is available via arcpy and metadata
Yeah I did stumble upon the Metadata class, it seems to work on whole layer metadata instead of the information related to certain areas or features. Could this data be accessed in a similar way to a feature class? Run a select by location off a point or polygon and then use a search cursor with the date field passed in? When running that code I get an "ERROR 000368: Invalid input data." which I think is due to a basemap layer not being selectable.