Screen reader specific ways of defining row/column headers are "local to" those specific screen readers.
This is why I always encourage people to set up row/column labels in Excel itself. There was just an extensive discussion regarding this, and how to set up row/column labels in Excel itself that "go with" the spreadsheet, somewhere. I need to do some searching to find it. I know that Alan Lemly wrote the tutorial on this, but I can't recall the group and topic at this very moment.
Brian - Windows 10 Pro, 64-Bit, Version 2004, Build 19041
It’s hard waking up and realizing it’s not always black and white.
~ Kelley Boorn