My Emacs icons for files etc. are blurry on my MB Air M1 laptop using an external 4k display. Here is an example from Treemacs, but it is the same in Dired:
As you can see, the fonts are ok, but icons are blurry.
How to identify the source file for the icon? Is there something like C-h and then something to show the icon file path so I can replace it for something that is compatible with 4k resolution?