Валерий

const arr = Object
  .entries(obj)
  .reduce((acc, [ k, values ]) => (
    values.forEach((v, i) => (acc[i] ??= {})[k] = v),
    acc
  ), []);

const keys = Object.keys(obj);
const arr = obj[keys[0]]?.map((_, i) => {
  return Object.fromEntries(keys.map(k => [ k, obj[k][i] ]));
}) ?? [];

const zip = (arrs, defaultValue = null) =>
  Array.from(
    { length: Math.max(...arrs.map(n => n.length)) },
    (_, i) => arrs.map(n => i < n.length ? n[i] : defaultValue)
  );

const combine = (keys, values, defaultValue = null) =>
  keys.reduce((acc, n, i) => (
    acc[n] = i < values.length ? values[i] : defaultValue,
    acc
  ), {});

const arr = Array.from(
  zip(Object.values(obj)),
  combine.bind(null, Object.keys(obj))
);