My iphone 11 wont charge anymore and is now dead.

1. Restart the device. That's it.
2. Still not solved --> Force restart iPhone - Apple Support

1. Follow the Apple article to resolve the issue --> If your iPhone, iPad, or iPod touch won't turn on or is frozen ...
2. If not resolved; please follow the steps in the following link for support with this issue: If your iOS device restarts or displays the Apple logo or a spinning gear unexpectedly

• You still see a black screen after charging, force restarting, following the steps in this article.
• You see a black screen, but you can hear alerts, sounds, and vibrations.
• The screen remains black, but the device chirps when you unmute it and connect it to power.
• Your screen is on, but it doesn't respond when you tap, slide, or try other gestures. 
• You can't force your device to restart because a button is broken or stuck.
• Your device is stuck on the Apple logo, displays a solid color, or isn't recognized in iTunes.

Contact Apple Support to set up service if you have any of the above issues:

Does it have any kind of water damage ? Have you tried putting it in a rice sack so that all the absorbed moisture inside the phone is completely gone ? This helped me once. I kept mine for 24 hours.

One more tricked which worked for me was cleaning the charging port with Alcohol Solution carefully, to remove any debris or carbon formation, if any. and then using a hair dryer to blow remaining debris out, on low heat setting. it also dries out the moisture and carbon formation to some extent. I've done this many times and it works most of the time. If you don't have an alcohol solution, you could use a good quality perfume (Not deo), by keeping the nozzle near the charging port.

Disclaimer: Please try these steps by putting your device on switched off mode, always and let it dry out completely for 10-15 minutes before you start your phone or put it on charge.

First ensure that your iTunes is updated. Then see if its detecting your phone or not. Then try restoring from itunes. please follow these steps and update us