Paulani

const arr = Array.from(
  { length: -~(Object.keys(obj).at(-1) ?? -1) },
  (n, i) => obj[i] ?? null,
);

const arr = Object.entries(obj).reduce((acc, n) => (
  acc.push(...Array(n[0] - acc.length).fill(null), n[1]),
  acc
), []);

- DrawerProps.items
+ DrawerProps['items']