How do i put batery percentage on iPhone x

If you're running iOS 16, you can head into Settings > Battery > Here you can turn on Battery Percentage.

Let me know if you're having any problems.

Show the iPhone battery percentage – Apple Support (UK)

Your profile shows that you are running iOS 14 on your iPhone X. You will have to update your iPhone to iOS 16.1 to get the battery percentage on the battery icon.

Axel F.