SharePoint/Graph API to Access sharepoint index and do a semantic search

Question

Given that our current KQL‐based /search/query approach in SharePoint REST is limited to keyword matching and lacks AI‐powered relevance ranking, is there an equivalent Microsoft Graph endpoint or SharePoint REST (for example, POST /search/query) that supports true semantic search, leveraging natural‐language processing and semantic ranking, to return more accurate, AI‐driven results from our SharePoint content?