Missing Publish to Microsoft Stream in Powerpoint 2016

I am not seeing the publish to Stream either I am on version: 1803 (Build 9126.2282 Click-to-Run)

I am signed into Office 365 - company on E5 plan.  I tried to open the PowerPoint Online, but recording is not an option (I don't often use the online versions of Office :-)).

Anything we can do to make it appear?  I really, really need it to promote using Stream in a more "casual" manner in my organisation.

Thanks in advance.