You can migrate reports created in Financial Reporting to Reports. Please note when migrating, the system will convert as many elements of the original report into the Reports equivalent as possible. However, there are differences between the two solutions, and not all elements exist in both solutions. You may have to modify certain elements after the report has been migrated to produce a report that is equivalent to the original report. See Differences between Financial Reporting and Reports
In Narrative Reporting deployments, you export reports from Financial Reporting and then import them into Reports.
In EPM Cloud deployments, you can migrate either with in-place migration where you can migrate all or individual reports, or by importing Financial Reporting report files that were exported locally from the Explore Repository.