Thanks Graphics in terminal is provided by kitty/sixel protocol and Konsole has support for both. I dunno of any GUI tools for this but throwing in a picture is quite easy.. Just edit your fastfetch config in ~/.config/fastfetch/

Open the terminal with alt+ctrl+t
Then:

kate ~/.config/fastfetch/config.jsonc

And edit your config to look something like this (this is my config)

{
  "$schema": "https://github.com/fastfetch-cli/fastfetch/raw/master/doc/json_schema.json",
  "logo": {
    "type": "kitty",
    "source": "~/Bilder/pngegg3.png",
    "width": 32
  },

  "modules": [
    "title",
    "separator",
    "os",
    "host",
    "kernel",
    "uptime",
    "packages",
    "shell",
    "display",
    "de",
    "wm",
    "wmtheme",
    "theme",
    "icons",
    "font",
    "cursor",
    "terminal",
    "terminalfont",
    "cpu",
    "gpu",
    "memory",
    "swap",
    "disk",
    "battery",
    "poweradapter",
    "locale",
    "break",
    "colors"
  ]
}

“source” is the path to the image you want so it’d be something like “~/Downloads/your_image.png” if you downloaded it from the web or whatever

Everything under modules is what information you want to be displayed (GPU, mem, disks etc)