Available on the VSCode Marketplace
I don't think you can do that. You can either submit a request in vscode icons repo, or switch to another theme that has .asm and .s icons. I like Material Icons.
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
Chrome Extension that replaces icons on Github.com with VSCode's Material Icon Theme.
Why does my VS Code doesn't recognize .html as HTML and instead it recognizes .html as HTML?
1 project | reddit.com/r/vscode | 6 Jan 2021
Tidier: Prettier but for File and Folder Names
2 projects | news.ycombinator.com | 22 Mar 2022
I created a CLI and VSCode extension called Tidier, it's like Prettier but for file & folder names. Let me know what you think!
your best vscode set-up
1 project | reddit.com/r/vscode | 31 Oct 2021