web/app/Providers/ViewServiceProvider.php

<?php

namespace App\Providers;

use App\View\Composers\ShopComposer;
use Illuminate\Support\Facades;
use Illuminate\Support\ServiceProvider;

class ViewServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     */
    public function register(): void
    {
        // ...
    }

    /**
     * Bootstrap any application services.
     */
    public function boot(): void
    {
        Facades\View::composer('layouts.shop', ShopComposer::class);
    }
}