Undefined variable: laravel 7 component

[noommii]

Hi everyone, I'm facing a problem in a project named pfDev Laravel 7:

I've 8 components in resources > views > components and their related classes located in app > view > components. Accessing a component named 'mobile.blade.php' with following code:
Code in resources > views > home.blade.php
<x-mobile :mob="$m"></x-mobile>
Code in app > Views > Components > Mobile.php

public $mob;
public function __construct($mob)
{
$this->mob = $mob;
}

Code in resources > views > components > mobile.blade.php
<h1> {{ $mob }} </h1>
working fine on: localhost:8000
BUT SHOWING ERROR $mob is undefined on: localhost/pfDev AND on shared hosting domain.com
I've registered the component manually in app > Providers > AppServiceProvider.php as:

public function boot()
{
Blade::component('mobile', Mobile::class);
}