The indexing of any website depends on way too many factors. Books have been written and talks have been held about it - a lot.

However, there are some likely cases of why you can't find your website listed in Google search results:

• Your website just went live/online and no Google bot  has crawled your website yet. Give it some time and check again later.
• Your website pages are not published (only admin users can see it) or the indexing for the pages in question is set to false. See for example https://www.odoo.com/documentation/18.0/applications/websites/website/structure/seo.html?highlight=seo#prevent-a-page-from-being-indexed (but toggle the switch on in your case, not off, if it isn't already)

You can also try to gain more insights of why your website's pages might not be indexed by utilizing the Google Search Console: https://www.odoo.com/documentation/18.0/applications/websites/website/configuration/google_search_console.html