This is a simple drop-in and you could use it to find problems or monitor your game objects. You can scroll through long lists with the keyboard. It works in multiple scenes. I plan to add mouse wheel controls and depth and coordinate precision options soon.
You can try it today with
this.load.scenePlugin('DisplayListWatcher', 'https://cdn.jsdelivr.net/npm/phaser-plugin-display-list-watcher@1.2.1')
or the traditional installation methods.