ANN search current state

[Mikhail]

Hi,
 
           I want to incorporate semantic search in my project, which uses 
Lucene. I want to use sentence embeddings and ANN (approximate nearest 
neighbor) search. I found the related Lucene issues:  
https://issues.apache.org/jira/browse/LUCENE-9004 ,  
https://issues.apache.org/jira/browse/LUCENE-9136 ,  
https://issues.apache.org/jira/browse/LUCENE-9322 . I see that there are some 
related work and related PRs. What is the current state of this functionality?
 
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Thanks,
Mikhail