Program/script structure visualizer?

Question

infographics

There is a script / program, you need to get their visualization in the form of a regular flowchart - Flowchart
In order to write pieces of the code of the program itself in blocks, does something like this happen?

Answer 1

Yes, as much as you want.
https://code2flow.com/
www.cocodex.com/code-to-flowchart
https://viktor-zin.github.io/afce/
https://sourceforge.net/directory/os:windows/?q= co...
https://code-to-flowchart.smartcode.com/
And further on the links.
Why would this be needed in real life?