Svgs are capable of anything. You can draw anything with it as it’s just a format for vector graphics. The vectors can be manipulated so you can even make a 3D game engine from it if you wanted.

The only thing that separates it from html and css is that html and css biases towards website styled stuff. HTML is designed for text boxes and that kind of stuff while svgs bias more towards a neutral drawing medium: shapes and vectors.

So because it’s more neutral you can even make a html engine from svg if you so wanted.