I'm not sure you are correct. I work with GIS (academic not commercial or accessibility related to be fair) but normally the issue with green and shades of green is when it's in contrast with a red or orange shade. That's when colour blind issues come into play.

If this were purely greyscale, you would be able to see each tone fine (although could be tweaked to increase contrast eg lighter green to start and bigger steps) which is the quick test for colourblind problems.