Before adding the BIM file to the local scene, use the geoprocessing tool to define projection, and use the slab feature class as the input.
Notes:
* BIM files are 1:1 so there is no need to scale.
* Use a local scene instead of a map.
Refer to the following link for more information, https://www.esri.com/arcgis-blog/products/arcgis-pro/3d-gis/geolocating-revit-files-in-arcgis-pro/.