I posted the other day, that .fbx 3d models cannot be imported in ArcGis Pro 3.2, it just crashes.
cannot load .fbx files - Esri Community
It seems Arcgis pro 3.2 cannot import all the supported formats (except .3ds)
I converted some very simple .fbx models, that were imported fine in 3.1 (and exist in my map), into other formats (obj, dae, dwg) and Arcgis crashes.