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.
workInProgress,
              dehydrated,
              renderLanes,
            );
          }
        }
      }
    }
    if (showFallback) {
      const nextPrimaryChildren = nextProps.children;
      const nextFallbackChildren = nextProps.fallback;
      const fallbackFragment = mountSuspenseFallbackChildren(
        workInProgress,
        nextPrimaryChildren,
        nextFallbackChildren,
        renderLanes,
      );
      const primaryChildFragment: Fiber = (workInProgress.child: any);
      primaryChildFragment.memoizedState = mountSuspenseOffscreenState(
        renderLanes,
      );
      workInProgress.memoizedState = SUSPENDED_MARKER;
      return fallbackFragment;
    } else {
      const nextPrimaryChildren = nextProps.children;
      return mountSuspensePrimaryChildren(
        workInProgress,
        nextPrimaryChildren,
        renderLanes,
      );