Is there a way to export join_features results to a shapefile?
You can export the results of a join to a shapefile utilizing the Feature Class to Shapefile tool. Refer to the images below for the proper syntax while using this tool in a python script. The first example demonstrates how to use the function in immediate mode. The second demonstrates how to use it in a stand-alone script.
Both examples were pulled from the tools documentation found at the URL below.
Feature Class To Shapefile—Conversion toolbox | Documentation
I hope this helps!