Hi @Ali Qureshi
Looks like this is built on WordPress. Unfortuantely there is no way to know if this is running on ASP.NET Core, but WordPress' back-end is in PHP language.
Some code snippets (wp-content):
https://pastebin.com/ke0vdrp6 (the HTML output).
HTTP / HTTPS Header Check (Checked the headers to see if there was any additional information, but none was served other than "cloudflare".
https://www.webconfs.com/http-header-check.php
POSTMAN Response: