Insights is not limited to chunks anymore within the API!
ScanOptions#setChunkLocations has been removed and has been changed into ScanOptions#setPartialChunks. This is due to the new way of scanning. You can however easily convert between ChunkLocations and PartialChunks. You will need to specify the world for this, so Insights knows what the max height is.
You can get Partial Chunks from 2 locations (cuboid region, see here), from regular org.bukkit.Chunk chunks and a lot more!