your attachment can't be opened, BTW
Yes I found that with the version 1.4, on my iPad you can select any text but the copy option doesn’t appear. An earlier version of the data sheet I had you could copy the file and it did not have the comment about fusion mode.
But always go with the latest data sheet.
The fact that you are failing to set the G to the value you want with that code you got from Adafruit has got to tell you something.
Edit
Yes that page 27 is what my old data sheet says but not the new one.
I got the new one on the Mouser site.
Note your link is to the version 1.2 and the new one is version 1.4