Excuse the confusion. I want the comments to be nested exactly as shown in the screenshot. Currently it looks different with me, of which I attach another screenshot.
The question is, can I show it as nested?
So I figured out. The comments are nested. It’s because of the CSS changes.
But even without these CSS changes, the comments are not nested as desired in the screenshot. They are then nested exactly as here: https://generatepress.com/generatepress-2-1/
I hope you could see the difference between the comments in the link and on my screenshot (what they should look like).