Is there a way for a content manager to add an existing module (one with shared content) in Evoq 8? I can't seem to find any way to do anything besides add a new instance of a module. Thanks!

Modules, Add Existing Module from the Control Panel when you are logged in should do the trick. Or am I not understanding the question?

I'm looking for the "content manager" security role instead of the admin role. Where they have the side dashboard links and not the top ribbon bar. This client uses the format where they have content editors that make changes that then need approved and published by an admin.

As this is Evoq, you might want to ask the question of the Evoq support team.