Three months ago, I submitted my single-page site to Google, but it is still not indexing

Three months ago, I submitted my single-page site to Google, but it is still not indexing. What exactly is the issue? I have done everything for indexing, such as using the instant indexing API, but it still doesn’t appear on Google.

My website has a total of 6 pages, but the sitemap shows 0 discovered pages.

whats the url inspection tool saying?

May be your keyword or article is violated the google Policies.