I noticed that Scalable Vector Graphics are not supported.
SVGs are popularly used for vector graphics; so I think they should be supported.
EDIT: SVG Code can be directly posted, since Lemmy supports HTML tags in Markdown. (Why didn’t I think of that earlier? lol)
Yes; but I am also referring to flags and icons.
Some people also make vector art; because it is easier to work in vector graphics than bitmap; wikipedia has an example image illustrating this.