Search ranking matters for some website.
If your website does not appear on Google search result, people will not find out or contact your business.
For a website to appear on Google search, this is related to Google indexing your website page.
You will need to submit to Google to review your website.
You can refer to below Google support team regarding your website indexing issue.
https://support.google.com/webmasters/answer/7474347?hl=en
Make sure you update your site with relevant content to increase your site ranking.
Update your website with keywords or term related to your website that user's might be searching for.
Seek for professional SEO assist to perform SEO audit on your website.