HOW TO UNLOCK IPHONE 7+ PASSWORD WITHOUT DELETING ALL THE DATA

Do mean password or passcode?

A passcode is a four or six digit number used to lock a single device. As it's stored only on the device it cannot be retrieved and the onlyl way to unlock the device is to erase it. Please see If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

The password is an Apple ID used to Activation Lock the device. You can gain access to the account of a deceased family member but note that this requires you to obtain a court order and know the Apple ID. Please see How to request access to a deceased family member's Apple accounts - Apple Support

Your phone has been disabled because you entered the wrong password too many times. This too means that the only way to proceed is to erase the phone. You are not going to be able to use the phone unless you erase it. I'm afraid there is no way round this. You can restore its data if you made a backup to iCloud.

If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

I'm afraid not. These recovery methods only work with the Apple ID, because the ID and password are stored online and so can be accessed by Apple under the right conditions. The passcode is stored only on the phone. and so Apple don't know it.

There is no way of bypassing the Passcode without erasing the phone. The message above gives instructions.

@Roger ... is there a dept to contact with proof of death like a death certificate .. and to request assistance same as a law enforcement subpoena?