If you're using ArcGIS Pro (or ArcMap), you'll need to create a LAS Dataset first to work with it in those applications.
The Create LAS Dataset geoprocessing tool licensing requirements are as follows:
- Basic: Requires 3D Analyst or Spatial Analyst
- Standard: Yes
- Advanced: Yes
Beyond that, here is a great resource link on working with LAS in ArcGIS Pro.
