public function boot(): void
    {
        Livewire::setUpdateRoute(function ($handle) {
            return Route::post('/livewire4/livewire/update', $handle)
                ->name('app.livewire.update');
        });

        Livewire::setScriptRoute(function ($handle) {
            return Route::get('/livewire4/livewire/livewire.js', $handle);
        });
    }

public function boot(): void
    {
        Livewire::setUpdateRoute(function ($handle) {
            return Route::post('/livewire4/livewire/update', $handle)
                ->name('app.livewire.update');
        });
    }

Customizing Livewire's update endpoint is not available.

The result displayed is "http://localhost/livewire4/livewire/update 404 (Not Found)."

server {
    listen 80;
    server_name localhost;
    index index.php;
    
    location /livewire4 {
        alias /var/www/livewire4/public;
        try_files $uri $uri/ @livewire4;

        location ~ \.php$ {
            fastcgi_pass web:9000;
            fastcgi_param SCRIPT_FILENAME $request_filename;
            include fastcgi_params;
            fastcgi_hide_header X-Powered-By;
        }
    }

    location @livewire4 {
        rewrite ^/livewire4/(.*)$ /livewire4/index.php?$1 last;
    }
}