If the Lidar data you have is ASCII format, I think you can just push line by line
to create dot/point in Unity (you may need to write/find a shader to render them).
but if the lidar data is LAZ or LAS format, convert it to XYZ format first.
idk if there's anyone who's interesting in this but
I will throw what I found:
sample Lidar datat
importing point cloud data to Unity
keep us updated how it goes
sounds really fun to do