In mesh auto leveling / grid auto leveling, people always show this graph data.

In mesh auto leveling / grid auto leveling, people always show this graph data. Any software that I can import the probe data and see the bed leveling graph like this?

People plot it in several things

You can easily do this in excel

yeah, excel… copy n paste the log into excel, do some cleanup, click on “add diagram” and boom, there you are…

How do you even get so much measure point?

For the graph try this online tool http://www.maui-3d.com/cgi-bin/plotG29 work fine with marlin, should work even with smoothie.
How can I use the G29 on a delta? Output message says “g29 no levelling strategy”.