Hello, ketty177.
We understand that you're having some issues when typing on your iPhone 11.
Does this only happen when typing? Are you noticing any other touch related issues while using other apps or features on your iPhone?
Start by following the steps listed here.
If you follow these steps, and the issue is present in multiple apps and the Home screen, then you should consider backing up and restoring your device.
Be sure to not restore your backup, and test the device while set up as new. If the issue persists after this, contact support for additional options: Get Support
Take care!