All remaining Spruce modals use antd's modal (via Modal component) and have actions (i.e. not just display modals). Add LeafyGreen's Confirmation Modal as a new dependency and replace all modals with it. It may be worth completing this ticket in a few PRs as the scope of this work is pretty big. I also noticed some issues with antd's Select dropdowns becoming unclickable on these modals, which may require more investigation.
Also worth noting that SeeMoreModal.tsx currently uses DisplayModal but could be converted to a Confirmation Modal as well.