You sort of have that - not automatically though, but you can run autotune against nightscout and get a report of where things need to be adjusted. I run oref1 with DyanmicISF, and just run autotune every few months just to tweak values.
I genuinely don't see where I would use an LLM in this process.
I agree. For us, who are really good with software and all that, AndroidAPS is really good when you can easily learn how to use it.
Not that great for non-technical people. But it saved my life at least.
Edit: thanks for reminding me about Autotune. I used the azure app ages ago, but it's now integrated in AndroidAPS behind a secret setting.