Regarding #199964, I was counselled to create an issue. I am not an expert on this issue, but I would like to invite the experts @PKief and @lucas-labs (excellent at designing the icons) because they understand better the icon theme API, so they can test the new custom icons for terminal and user profile with the extension Material Product Icon Theme.

I am not sure if my issue is related to #211811, but I am referring to the terminal and user profile icons and not to the VSCode GUI icons.

We would like to be able to choose our [own] custom icons for user profile and terminal icon? For example, Codicons does not have brain, flower, paint roller icons, unlike Font Awesome has. I am not sure if that they can be shipped with a product icon theme extension, like Philipp's.