Just to be clear, are you saying that JAWS has a command in its Excel script that allows you to generate a list of all cells in a worksheet that have data in them, and to navigate that list directly?
I know how to jump to the next cell with data in it from wherever I am (and it works down columns then, I believe, jumps to the next column when the last populated cell in a given column has been reached, but I can't remember having done that jump in a very long time). CTRL+Down Arrow jumps to the next cell with data in it.
Brian - Windows 10 Pro, 64-Bit, Version 20H2, Build 19042
If you think that you can think about a thing, inextricably attached to something else, without thinking of the thing it is attached to, then you have a legal mind.
~ Thomas Reed Powell