Hello I got a new iPhone 16 pro max it’s freezing I can’t enter my password

If the screen is on, how do you know this? Can you see anything on the screen? If it is not responding to your touch, then it is frozen. If the troubleshooting steps in the link I provided you, then you need to go further. Here is the last line of that support document, you need to contact Apple.

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If your iPhone still isn't working, you might need service. Get service

See the steps here to troubleshoot if your iPhone is frozen. If your iPhone won't turn on or is frozen - Apple Support

What happens when you try to put in your password? Is the screen responding to your touch?