See iPhone 8 Battery Percentage
You can still see the iPhone 8 battery percentage in the upper right corner if you want to keep an eagle-eye on how much life is left in your iPhone. This is a setting you need to turn on, but unlike the iPhone X, you don't need to swipe every time you want to see it.
Go to Settings -> Battery - > Battery Percentage -> On.
This places the battery percentage in the upper right corner of the screen all of the time so you know how much battery life is left. This is actually useful now that you can fast charge the iPhone 8 or iPhone 8 Plus to get 50% of your battery charged in 30 minutes.