This is an interesting one...
Somehow you are trying to build without using some configuration or other and it's sending you the wrong direction.
If you want a point cloud, you don't need the VL53L8CH. It can do it, but you are wasting a lot of bandwidth sending Compressed Normalize Histogram (CNH) data around.
Take your setup and use the code for the VL53L8CX code - you already have it downloaded -STSW-IMG040.zip.
Just build that and you will get the distances for each zone. And from that you can build your point cloud.
And with a little luck, learning how that code works will show you where you went wrong building the VL53L8CH code. (Although I have to admit, I cannot understand where you went wrong. )
- john