How to instant index example*web*app [firebase]

Hello, How are you all. I hope everything going well.​

I have question how to instant index this type subdomain (example*web*app [firebase]). I saw many people using Aws s3 method in sports events. They are index instantly on google and get huge traffic. I am also connect google search webmaster. And manually setup sitemap xml file in my other hosting. 3 days past but not indexing.

I am trying on GitHub. First create repo and copy this repo link and make custom sitemap xml file upload to my hosting and it's index less than 24 hours. But Firebase, Netlify not work for me.

Any Blackhat method or suggestion can I index this type of website?

They might be using the gcp indexing api

AWS S3 works because it serves static files fast, and some use aged domains with backlinks. Firebase and Netlify don’t trigger Googlebot the same way. Try expired domains with 301s, spamming the Indexing API, social signals + Google News feed.

Lots of parasites will help you to get indexed quickly. I've used Medium in the past, it still works well when posting longer content but you used to be able to just fling up a list of links and it would get them all indexed. I'm not sure if you can do it the super lazy way anymore.