Learn everything about the Sphere Shape Location module in Unreal Engine 5.3 Niagara! 
In this tutorial, we dive into how to spawn particles across sphere volumes, surfaces, hemispheres, and custom patterns using direct and uniform distribution, plus full transform controls and spawn group masking.
https://dev.epicgames.com/community/learning/tutorials/58qoO/unreal-engine-ue5-3-niagara-shape-location-sphere-emitter-explained-vfx-basics-part-22