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.
primaryChildFragment.selfBaseDuration = 0;
      primaryChildFragment.treeBaseDuration = 0;
    }
    fallbackChildFragment = createFiberFromFragment(
      fallbackChildren,
      mode,
      renderLanes,
      null,
    );
  } else {
    primaryChildFragment = createFiberFromOffscreen(
      primaryChildProps,
      mode,
      NoLanes,
      null,
    );
    fallbackChildFragment = createFiberFromFragment(
      fallbackChildren,
      mode,
      renderLanes,
      null,
    );
  }
  primaryChildFragment.return = workInProgress;
  fallbackChildFragment.return = workInProgress;
  primaryChildFragment.sibling = fallbackChildFragment;
  workInProgress.child = primaryChildFragment;
  return fallbackChildFragment;
}
function createWorkInProgressOffscreenFiber(