Is it possible to keep dot files with specific extension unhidden in Finder?
I assume you are talking about the .vscode folder in your Home folder, as I have one there too from the Visual Studio Code.app install.

If you do not want to permanently show hidden files or use the ⌘⇧. keyboard shortcut, then this is what I'd do.

Open Terminal to the directory containing the .vscode folder and use the following command to create a symlink:

ln -s .vscode ' .vscode'


Note that the symlink has a leading space in its name; however, it's the only way to be visually accurate, per se, seeing it shown in Finder to have the appearance that it is a dot file without actually showing the hidden .vscode folder.