Incremental refresh : data published and older than the refresh row period are deleted

Hi Astra ,

When using incremental refreshing in Power BI, older data will not be refreshed or imported again into Power BI.

You may refer to this blog for help.

https://blog.crossjoin.co.uk/2020/04/13/keep-the-existing-data-in-your-power-bi-dataset-and-add-new-data-to-it-using-incremental-refresh/

https://community.powerbi.com/t5/Community-Blog/Incremental-Refresh-with-Slow-Changing-Source-Data/ba-p/1224684

https://ideas.powerbi.com/ideas/idea/?ideaid=d282ada6-f7fc-44c7-833a-6d20b4ce5d50

And I found similar ideas here ,you could give your votes at power bi site's feedback -https://ideas.powerbi.com/ideas/idea/?ideaid=de3bb937-9fc7-ea11-bf22-501ac5247547

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Best Regards,
Eyelyn Qin