In order to obtain relevant metrics of the progress, both of your tests and the completeness of your requirements, Xray provides several ways that make it easier for the whole project team have a clear overview on "how ready" the project is.

Have always in mind that Xray essentially uses JIRA issues, so you can always use JQL to obtain relevant resuts. As standard JQL may not be enough, Xray provides an extensive list of JQL functions that may be used to obtain relevant data.

Xray also provides access to all custom fields (e.g. Test status, Test Set status, Test Execution status, requirement coverage status) , and it has some specific queriable custom fields .

Those fields may be exposed directly in the standard JIRA search result table or in gadgets, such as JIRA's "Filter Results" gadget. In fact, you're able to use standard JIRA gadgets to make most of the reports you may need but Xray also provides some specific ones, namely for requirement coverage.

Advanced users may take advantage of eazyBI's integration for accessing Xray's data in multiple ways and make fully customized reports. 

In sum, your reporting may be accomplished using standard JQL queries, or by consulting the specific panels of Tests/Test Sets/Test Plans/Test Executions, or by building out dashboards + gadgets, or by using eazyBI's advanced reporting capabilies, or even by using specific Xporter templates, if you want fully customized reports as a docx, xlsx or pdf assets.