Two on off icons

They are there to open and close the Control Center:

When you wake your iPhone X for the first time, you'll probably notice a subtle animation in the top right of the screen that slides down to reveals a couple switches, one toggled on and one toggled off. At first, the meaning of this could be confusing, but it's just Apple's way of helping you learn your new device better.

The switch icons that appear in the top right on your lock screen are indicative of the new swipe gesture to open up the Control Center. On other iPhones, you swipe up from the bottom of your screen to access the Control Center, but on the iPhone X, you swipe down from the top-right corner instead.

Once you actually perform a swipe down on the top right of the screen to open up the Control Center, you'll likely never see this animation again. It's basically just a quick tip Apple built in to help you get accustomed to some of the new swipe gestures available. If you update your system to a newer iOS version one day, the animation may appear again, but mimicking it will make it go away again.

This is the article the snippet above is from: https://ios.gadgethacks.com/news/what-are-those-animated-switches-top-right-when -you-wake-iphone-x-0180949/

I couldn't find a specific reference to it in the iPhone User Guide, but it could be in there somewhere: http://help.apple.com/iphone/11/#/iph0e5ab7007

It did specify that to open the Control Center with an iPhone X, you had to swipe from the upper right-hand side, but did not reference the "learning" animation.

Cheers,

GB

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Cheers,

GB