Hey there Nvsr,
If your keyboard appears wider than expected and causes issues with using the keys, first try restarting your device to refresh your software.
If this persists after restarting, check to see if this happens in multiple apps. If it only happens in a particular app, force close the app and test again:
1. From the Home Screen, swipe up from the bottom of the screen and pause in the middle of the screen.
2. Swipe right or left to find the app that you want to close.
3. Swipe up on the app's preview to close the app.
Close an app on your iPhone or iPod touch
If this continues, please provide more specific details on the behavior in a reply for additional support.
Take care!