What spatial data source are you using? Please refer to this document: https://learn.microsoft.com/en-us/sql/reporting-services/report-design/maps-report-builder-and-ssrs?view=sql-server-ver16.
I only found one similar thread, maybe you can use it as a reference: https://social.msdn.microsoft.com/Forums/en-US/896b06ff-5c0e-4e39-9b45-e006e5cbb056/state-missing-in-ssrs-2008-r2-map-report?forum=sqlreportingservices.
Best regards,
Aniya