We do have sharepoint connectors, but those are to manage user LCM on sharepoint access, not to read files from it.
I would suggest to go with SQL loader connector.
If not then build some script PowerShell or Python to read file from SharePoint and use File Upload Utility to run the aggregation. You can find more details here for the same.
Automating delimited file aggregations using the File Upload Utility - Content / Video Library - SailPoint Developer Community
– Krish