Hey @juliennakache UX designer at Graphite here,
All PRs will be shown with the proper draft/open/closed/merged states on GitHub and on Graphite, we do a lot of work to make sure that the real-time status is synced between the two so that you can adopt Graphite without disrupting your team's existing workflow.
Would love to know other pain-points you have around GitHub so that we could make Graphite even better for you and your team