AI Triage doesn’t have to be a whisper, it can also be a public post, but it’s still automatic so it doesn’t suit your request for a button. So you’re correct in that there’s not currently a feature like this.
You could also create an AI bot that you can ask to generate a response in chat, which looks like this:
…but still, not exactly what you’re asking for.
I suppose a natural place like this would be our AI toolbar button, we could consider adding a “generate reply” option here… currently this is more focused on editing what you’ve written.