To speed up the process of getting your domain into search engines, you need to register in Google Search Console (or Webmaster for Yandex search engine), and confirm your domain ownership.
Learn more: http://help.tilda.ws/search-engine#google-yandex
To connect Google Search Console to your website, go to Site settings → SEO → Google Search Console → Manage.
The you have to add "sitemap.xml". Add the "sitemap.xml" link to Google Search Console (replace "http://tilda.cc" with your website domain):
Also add the "sitemap.xml" link to Yandex.Webmaster for the Yandex search engine.