Hello Riz Pham,
Thanks for that info and choosing the Apple Support Communities. If I understand correctly, you are unable to see the battery status of your AirPods charging case on your iPhone. To help with your situation, please look at the specific positioning on when this will display in the section titled "Check the charge status" from this Apple resource:
Charge your AirPods with charging case and learn about battery life
If you're still having this issue, please reset your AirPods with these steps from this Apple resource:
- Go to Settings > Bluetooth and tap the icon next to your AirPods.1 Then tap Forget This Device.
- Put your AirPods in the case and close the lid. Wait 15 seconds, then open the lid.
- Press and hold the setup button on the back of the case until you see the status light flash amber a few times, then flash white.
- Place your AirPods close to your device. Follow the steps on your iOS device's screen.
Get help with your AirPods
Cheers!