Not on the iPhone 12!
These days, the battery percentage option is on by defaultyou just have to know where to find it.
Swipe down from the top right corner of the iPhone 12 screen to openiOS Control Center.

In the top right corner of the screen, next to the battery icon, is the battery percentage.
This is how much battery your iPhone 12 has left.
Swipe up or tap on the background to close Control Center again.

Here are the different ways you cancharge your iPhone 12.
One way to find the battery percentage on iPhone 12 is to ask Siri.
The battery percentage will appear on the screen.

Here’s how:
Tap and hold the screen until the icons start wiggling.
In the widgets pop-up, tapBatteries.
Choose the widget style you want to use.
Swipe back and forth to see the options.
The Batteries widget will also display battery info for Apple devices connected to your phone likeApple WatchorAirPods.
TapAdd Widgetfor the one you want to use.
The widget is added to your home screen.
Move it around to the location where you want it and then tapDone.
Seeing your battery percentage is good information, but it doesn’t help your battery last longer.
There areways to extend an iPhone’s battery lifesuch asusing iOS Low Power Mode.
Turn on auto-brightness, use content blockers in Safari, and disable Wi-Fi when you don’t need it.
Turn on Low Power Mode to conserve the battery when it falls below 80%.
If your iPhone battery icon is yellow, it means Low Power Mode is enabled.
If you see ared iPhone battery icon, the battery is critically low.
To determine if you need toreplace your iPhone battery, go toSettings>Battery>Battery Health.
If you need a new battery, use Apple’s battery replacement service.