What's the point of the Battery Widget?!

All Apple lovers like their Apple ecosystem to work seamlessly and the key area is ensuring that all the batteries are charged.

I am really confused that when I create a 'Battery Widget' on my iphone, I have no idea of any other devices such as my iPad, Pencil, etc ... when using the iphone widget. It only shows the iPhone and my Ultra 2 watch.

There is clearly multiple slots but no information from my iPad Air ... come on Apple?

Thanks

Sunny