Thanks for reaching out; let me know if the tips above help at all. Is your issue with your site not showing up on Google results? What's the issue with Facebook exactly? If you'd like to provide some more details, I'd be happy to offer some additional tips. Thanks!
While submitting your sitemap to Google certainly helps with your search results, there are other steps you'll also want to take in order to improve your SEO and have your site be easily found via search engines. I'd suggest walking through this guide, which will take you through additional steps such as adding keywords and optimizing your site structure. Another thing to keep in mind is that it can take Google a few weeks to crawl your entire site, which may also delay those results. Hope that helps!