First time visits in Report Builder

Hi, 

You can check 'Product Compatibility' of the calculated metric in the metric definition itself. See #11 in screenshot below:

Document Reference: https://docs.adobe.com/content/help/en/analytics/components/calculated-metrics/calcmetrics-reference/cm-compatibility.html

If the metric is compatible, you can access the Calculated Metrics created under specific report suite, in Report Builder click on the filter icon for Metrics and then select the Report Suite under which it is created. This will make the same available in the list - screenshot below:

Refer article: https://experienceleaguecommunities.adobe.com/t5/adobe-analytics-questions/calculated-metrics-not-available-in-report-builder/qaq-p/366070/comment-id/18773#M18773

Hope this helps!

Thanks,

Saumya