Some users have reported that the Pixel and Pixel XL keyboard stops appearing. This is a known software issue with Google Pixel devices.
To fix this:
- Turn on the Google Pixel and go to the Menu.
- Go to Settings > Apps & Notifications > Application Manager
- Select the "Gboard" app
- Tap Force stop
- Tap Storage, then "Clear cache" and "Clear storage"
- Restart the device