Spatially, Insights only works with vector data but it also allows you to work with non-spatial data, although not OLAP cubes directly.
As of the version of Insights to be released in July 2020, possible data connections are: Feature layers, Excel, GeoDatabases, CSV, Shapefiles, SharePoint Lists, GeoJson, OneDrive access
Databases: SQL Server, Oracle, Postgres, SAPHana