Why is Google not indexing my website?

I have created a web page recently. My problem is that if, for instance, I make a Google search with “site:” syntax; I don’t get any result, even it has been already one month.

I don’t have a robots file. I also uploaded a sitemap to Google that contained this page too. I think the problem might be the fact that the only link from my main page to the new page opens in a new window. Could this be the problem?
page URL https://www.assureshift.in/packers-and-movers-pune