### Website or app

https://github.com/reactjs/reactjs.org/pull/4981

### Repro steps

1. Wrap something into `<Fragment key="stuff">`
2. It doesn't show up in DevTools

We filter out fragments because they tend to be useless. But this one is important! Keys are crucial and we should show anything with a key in the tree.

### How often does this bug happen?

Every time

### DevTools package (automated)

_No response_

### DevTools version (automated)

_No response_

### Error message (automated)

_No response_

### Error call stack (automated)

_No response_

### Error component stack (automated)

_No response_

### GitHub query string (automated)

_No response_
if (primaryChild !== null) {
            mountFiberRecursively(
              primaryChild,
              shouldIncludeInTree ? fiber : parentFiber,
              true,
              traceNearestHostComponentUpdate,
            );
          }
        }
      } else {
        if (fiber.child !== null) {
          mountFiberRecursively(
            fiber.child,
            shouldIncludeInTree ? fiber : parentFiber,
            true,
            traceNearestHostComponentUpdate,
          );
        }
      }
       W
       I
      updateTrackedPathStateAfterMount(mightSiblingsBeOnTrackedPath);
      fiber = traverseSiblings ? fiber.sibling : null;
    }
  }
   We use this to simulate unmounting for Suspense trees
   when we switch from primary to fallback.
  function unmountFiberChildrenRecursively(fiber: Fiber) {
    if (__DEBUG__) {
      debug('unmountFiberChildrenRecursively()', fiber);