You're not missing anything - Atlassian tend to think of Confluence as a wiki-type collaboration tool, not an analytics and tracking platform. The use-cases for it are all about working together and producing useful documentation and shared information for publication, not about tracking reads.
There is some basic tracking built into it, but it doesn't really scale, so it's turned off by default, and not available on Cloud.
Of course there are add-ons which enable tracking, and there's always google-analytics (and others), but I don't know that any of them are available for Cloud.
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