wpgraft does not care that a language model wrote the HTML, or what framework it used. It reads the page as your browser rendered it: the real elements and the real computed styles on each one, at every width you ask for. It then builds that as Figma layers: frames, text, vectors and image fills, with auto layout wherever the page was genuinely laid out in rows and columns. Nothing that arrives depends on v0 still being there.
v0 generates React components that look finished; reviewing and adjusting them as a design is easier in Figma than in code. Open the preview in its own tab and wpgraft builds what it rendered into your Figma file as frames, text and images.