If you have accidentally deleted report data in Power BI Desktop, there may be a few options available to recover it:
Check the Recycle Bin: Power BI Desktop has a Recycle Bin feature that can be used to recover deleted items. To access the Recycle Bin, click on the 'Home' tab in the Power BI Desktop ribbon, then click on the 'Recycle Bin' button. If the deleted report data is in the Recycle Bin, you can right-click on it and select 'Restore' to recover it.
Use a previous version: Power BI Desktop has a version history feature that can be used to restore previous versions of a report. To access the version history, click on the 'File' tab in the Power BI Desktop ribbon, then click on 'Version history'. From there, you can select a previous version and click on 'Restore' to recover it.
Use a backup: If you have a backup of the report data, you can restore it from the backup. This could be a backup that you have created manually or a backup that has been created automatically by your organization's IT department.
Contact Power BI support: If the above options do not work, you can contact Power BI support for further assistance. They may be able to help you recover the deleted report data.
It's important to note that if you have saved the report after deleting the data, it may not be possible to recover it. Therefore, it's always a good idea to create backups and use version history to prevent data loss.