Where are the Impact Metrics for this?

If you don't see impact metrics for a content type, you either don't have permission to view them, or they're not available to that type of content.

Authors and a few others can use Impact Metrics as a way to measure how the content is received by the community.

Who Can See Impact Metrics for Documents, Discussions, and Videos?
The content author and everyone with admin rights can see the Impact Metrics. When you publish the metrics to everyone, then everyone who can view the content can see the Impact Metrics for it.
Who Can See Impact Metrics for Blog Posts?
The content author can see the Impact Metrics. When you publish the metrics to everyone, then everyone who can view your blog post can also see the Impact Metrics for it.
What Types of Content Show Impact Metrics?
Blog posts, documents, discussions, and videos show Impact Metrics. If your community has been recently upgraded to include this feature, all content created before the upgrade cannot be tracked with Impact Metrics.