How to show different contents on the same slug in laravel?

I want to show different contents on the same slug in my laravel app.

The following works like a charm with the posts and pages, so if the slug matches a page/post slug, it'll load the content.

routes/web.php:

/// ADMIN ROUTES
Route::middleware(['web', 'auth'])->prefix('admin')->group(function () {
Route::get('/', [AdminController::class, 'index'])->name('admin');
Route::resource('roles', RoleController::class);
Route::resource('pages', BackendPageController::class);
Route::resource('permissions', PermissionController::class);
Route::resource('posts', BackendPostController::class);
Route::resource('users', UserController::class);
Route::resource('packages', PackageController::class);
Route::delete('/users', [UserController::class, 'deleteAll'])->name('users.delete');
Route::delete('/pages', [BackendPageController::class, 'delete'])->name('pages.delete');
Route::prefix('modules')->group(function () {
Route::get('/', [ModuleController::class, 'index'])->name('modules.index');
Route::get('/enable/{moduleName}', [ModuleController::class, 'enable'])->name('modules.enable');
Route::get('/disable/{moduleName}', [ModuleController::class, 'disable'])->name('modules.disable');
});
});
/// FRONTEND ROUTES
Route::middleware('web')->group(function () {
Route::get('/', [ContentController::class, 'homePage']);
Route::get('/{slug}', [ContentController::class, 'show'])->where('slug', '^[a-z0-9-]+$');
});

app\\Http\\Controllers\\ContentController.php show method:

public function show($slug)
{
$page = Page::where('slug', $slug)->first();
$post = Post::where('slug', $slug)->first();
if ($page) {
return view('frontend.pages.show', compact('page'));
}
if ($post) {
return view('frontend.posts.show', compact('post'));
}
abort(404);
}

But I want to use the laravel-modules package and if I create a new module for ex.: Product then the default route in the Modules\Product\Routes\web.php is:

Route::prefix('product')->group(function() {
Route::get('/', 'ShopController@index');
});

But the localhost/product link throws a 404 error because of my ContentController show method logic... how can I achieve that if the slug doesn't match with the page/post slug then use the default logic?

I don't want to seperate the pages and the posts like localhost/pages/xy or localhost/posts/xy

Use Laravel Fallback Routes (8.0 or higher only)

In route file

Route::fallback([ContentController::class, 'fallback']);

In Controller

public function fallback($slug)
{
$page = Page::where('slug', $slug)->first();
$post = Post::where('slug', $slug)->first();
if ($page) {
return view('frontend.pages.show', compact('page'));
}
if ($post) {
return view('frontend.posts.show', compact('post'));
}
// If unmatch, then 404.
abort(404);
}

>You can use $request->query() if you use Request params in the method.