No can do then.
If I recall right I has asked similar thing at some point: reply to post is hard to understand for ordinary user with FB background and they don’t react to reply icon. And back then the answer was that is basically an impossible task. I was wondering to use nested style with diary type topics, but that is really confusing system even if there would be more informative reply button.
The issue — and the reason why I’m heavily off topic now — is topics longer than about four posts and earlier post or original one, weaks up some thoughts to comment. Specially newer users don’t comment because they don’t see a reply they recognise. But that is a question of the very base of Discourse and I hoped your TC would be an answer.
If I’ve had skills, and that would be possible, I would like to see a reply right below a toolbar (or what ever its name is).
But thanks a lot you used your time and tried.