
It is still the case today. Currently, the Microsoft Purview Data Map doesn't support scanning SharePoint and OneDrive into the Microsoft Purview Data Catalog.
As an alternative way, you could use Microsoft Purview Information Protection scanner to scan SharePoint on-premises files.
Scanning for on-premises SharePoint sites and libraries is provided through the Microsoft Purview Information Protection scanner. The scanner is available for use through a customer's Microsoft 365 subscription with the following SKUs: AIP P1, EMS E3, and Microsoft 365 E3. If you have any one of these SKUs, you should have the right entitlements to start using the Microsoft Purview Information Protection scanner.
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