There's no simple export button for call history the way there is for, say, a chat transcript. Getting actual Call Detail Records, who called whom, when, how long, requires going through Microsoft Graph's Cloud Communications API, which means an app registration and the right permissions, not a report you download from the admin center directly. For a business that wants call volume showing up in its own reporting or dashboards, that API is the real path, not a built-in export.
Click-to-call from a Teams contact card also doesn't automatically log anything into a CRM or helpdesk on its own. The call happens, but nothing writes back to say it happened unless something's built specifically to catch that event and record it where the rest of that customer's history already lives.