I have the following model.

<?php namespace App;

use Illuminate\Database\Eloquent\Model;

class User extends Model {

    use SoftDeletes;

    protected $table = 'users';
    protected $fillable = [
        'user_name', 'created_at', 'created_by', 'updated_at', 'updated_by', 'deleted_at'
    ];

    public static function boot() {
        
        parent::boot();

        // This works and updates my updated_by column        
        User::updating(function($user)  {
            $user->updated_by = 1;
        });
		
		// This is being ignored and does not update the updated_by column
        User::deleting(function($user)  {
            $user->updated_by = 1;
        });
    }
    
}

Since the delete is just a table update of the deleted_at column...why would this be ignored?