If you have `memo(forwardRef(X))`, then the inner component won't have a "rendered by" list. This is because it technically doesn't have an owner. It is artificial.

I think we should ideally set up `_debugOwner` for these Fibers in DEV just so existing tooling can find them. Or special case them in DevTools.
current,
  workInProgress,
  primaryChildren,
  fallbackChildren,
  renderLanes,
) {
  const mode = workInProgress.mode;
  const primaryChildFragment = createFiberFromOffscreen(
    primaryChildren,
    mode,
    NoLanes,
    null,
  );
  const fallbackChildFragment = createFiberFromFragment(
    fallbackChildren,
    mode,
    renderLanes,
    null,