Hello,
Thank you for contacting Rank Math, and sorry for any inconvenience caused.
I checked the website, it is correctly set to index.
The sitemap and robots.txt files are also working fine.
Please make sure that you have submitted the sitemap in the Search Console as it helps Google to crawl the website efficiently.
https://rankmath.com/kb/submit-sitemap-to-google/
However, please note that crawling and indexing of the website depend on the authority and crawl budget of the website.
As your website is new, I will suggest you wait for some time and let Google crawl your website and index the website.
Ranking on Google depends on so much more than just your on-page optimization. You could have the perfect article and still struggle to break the top 10 in SERPs. Here are some of the factors Google considers when ranking you:
1. Your website’s authority
2. Your content’s quality and how better it is than the other article currently ranking.
3. How competitive the keyword is.
4. How many backlinks you have and if they are better than what the other guys ranking for that keyword have.
5. Your website’s crawlability.
6. Frequency of new content and content updates.
7. So much more that there is a dedicated blog post on it by Brian Dean 🙂
https://backlinko.com/google-ranking-factors
Hope that helps.
Don’t hesitate to get in touch if you have any other questions.