Roadmap items, their order, and their state (completed / current / planned) are all stored in a single textarea meta field (status_roadmap), one 'Label|state' pair per line. Line order is roadmap order. WordPress has no native repeater UI, so this keeps the whole roadmap editable as one ordinary field rather than requiring custom admin UI or a plugin.
Store the Roadmap as one delimited textarea instead of a repeater field
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