Support

Charging is possible on the side of the iPad if your iPad supports charging. The following models are compatible with Graphite PRO: iPad Pro 2018 and later, iPad Air 2020 and later, and iPad mini 6th generation.

If you hold your finger on an empty space on the screen, the icons will "shake". Put a + in the upper right corner to add new widgets. Find Battery in the widget sections of the list, or type Battery in the search box. From here you can choose a specific widget to add. Once selected, the widget will be added to your desktop and will display your connected devices.

Yes, it's possible. You need to enable the feature directly on your iPad : https://support.apple.com/en-us/HT211774