Reference list for all Office 365 SKUs in PowerShell?

Sadly, no. As we need the list for our products, I periodically probe different MS folks about it, and I'm almost certain that there are like 2 people in the whole organization that have the full list, and they try to keep this information as secret as possible :)

The closes you can get is here: https://docs.microsoft.com/en-us/azure/active-directory/active-directory-licensing-product-and-service-plan-reference

Which is also far from complete and is getting outdated...