Browser: Scenic is not a web browser. It is aimed at a fixed screen devices and certain types of windowed apps. It knows nothing about HTML.
3D: Scenic is a 2D UI framework. It uses techniques from game development (such as transform matrices), but it does not support 3D drawing at this time.
Immediate Mode: In graphics speak, Scenic is a retained mode system. If you need immediate mode, then Scenic isn’t for you. If you don’t know what retained and immediate modes are, then you are probably just fine. For reference: HTML is a retained mode model.
So I think that your svg’s should render correctly.