getting 403 error in search console for laravel 11 website

I have website which has 600k posts. When I submitted website to google search console, Some of posts getting 403 error. Here I am using laravel page cache package .htaccess file

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews -Indexes
    </IfModule>

    RewriteEngine On

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_URI} (.+)/$
    RewriteRule ^ %1 [L,R=301]

    # Serve Cached Page If Available...
    RewriteCond %{REQUEST_URI} ^/?$
    RewriteCond %{DOCUMENT_ROOT}/page-cache/pc__index__pc.html -f
    RewriteRule .? page-cache/pc__index__pc.html [L]
    RewriteCond %{DOCUMENT_ROOT}/page-cache%{REQUEST_URI}.html -f
    RewriteRule . page-cache%{REQUEST_URI}.html [L]
    RewriteCond %{DOCUMENT_ROOT}/page-cache%{REQUEST_URI}.json -f
    RewriteRule . page-cache%{REQUEST_URI}.json [L]
    RewriteCond %{DOCUMENT_ROOT}/page-cache%{REQUEST_URI}.xml -f
    RewriteRule . page-cache%{REQUEST_URI}.xml [L]

    # Send Requests To Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^ index.php [L]
</IfModule>

all 600k posts can be access through single route with related slug. route.php

Route::middleware('page-cache')->group(function () {
    .
	.
    Route::get('/{slug}', [HomeController::class, 'handleRequest']);
   .
});

I am using hostinger hosting.