I recently went to a talk by Don Syme, the creator of F#. He was talking about the LLM tools he is working on at GitHub Next for summarising PR and code base content. He seemed pretty upbeat about the impact these tools will have.
Scott Wlaschin wrote a good book on this topic “Domain modelling made functional” and you can find his talks and articles online. I think this is a decent introduction, https://techleadjournal.dev/episodes/79/