Microsoft Graph API for search suggestion

Is there any API to get search suggestion for Microsoft search? I see an API call to https://substrate.office.com/search/api/v1/suggestions?query=contos through default Microsoft Search box which returns suggested Files, Sites, People etc.

What is equivalent MS search graph API call to get this suggestion ? I need to build custom search box with query suggestion like one below.

I checked PnP modern search box webpart configured with Microsoft Search but it not returning any suggestion, any help there?