iPhone X and later models designed with notched screen, due to limited space in the notification bar, percentage of battery is unable to displayed like the iPhone 8 and previous models.
This may be a little bit inconvenient for users who are concerned about battery life and battery consumption. If you want to show the percentage of battery on your iPhone X-series models, you can use the plug-in Arkrome.
First, use 3uTools to jailbreak your iDevice, if you don’t know how to do, you can refer to this jailbreak tutorial, then search for the plug-in Arkrome in Cydia.
After the installation is completed, no setting is required, and the real-time battery will be displayed in the battery frame. The battery color will be different depending on the charging status, low power mode, and not charging status. The plugin is compatible with iOS12.X systems and A12 devices.
Not charging status:
Low power mode: