Indexing Angular JS pages
I found a previous question related to Angular JS pages:
but it looks like it went cold around November 2016.
Can Coveo for Sitecore be set up to crawl / index pages build on Angular JS?
The previous question you found was not regarding the Coveo for Sitecore solution. It was regarding the Coveo web crawler. This crawler is not used by Coveo for Sitecore.
Coveo for Sitecore can index the rendered HTML of Sitecore items with an AngularJS layout and components only if the Sitecore instance is server-side rendering the pages on first load (on a GET request to the page itself).