How can I see the percentage of my battery life on my new iPhone pro max 12?

You can TOUCH and PULL DOWN from the TOP RIGHT Corner and that will disclose the Control Center. You will see the battery percentage at the top right corner.

Furthermore, you can install the larger size of the Battery Widget on one of your home screen and that will display the battery charge percentage at all times.

Axel F.

if you're trying to get it in the upper right part of the screen.. you can't on Face ID models.

you can see the battery percentage by pulling down on the upper right of the screen in Control Center, or you can ask Siri, or you can put a battery widget in Today View or on your Home Screen