Edit: This is incorrect, I was looking at external object activities instead of external activities.
No – as the guidance mentions the module is included by default. I’ve just tried to do that now – but am getting an error in relation to the project path size:
I’ve just downloaded some Atlas templates today successfully without this error!
Download the package file which is on the starting page of 10th Module. Add it to your Mendix/Mendix Pro application. There you can find Nanoflow commons and External activities. Export Module Package to your desktop and import it again to your App.
Here’s a screenshot:
(There are no ‘external activities’ or ‘open map’ objects listed)