Did you ask them? A quick call along the lines of "Hey, we talked about this, and you haven't taken up my offer to demo a solution -- please, I won't be offend

Did you ask them? A quick call along the lines of "Hey, we talked about this, and you haven't taken up my offer to demo a solution -- please, I won't be offended and this isn't a sales pitch, but could you tell me why that is?" As always, the advice is: just actually _talk_ to people. Not email, not a survey form, not a Slack message, _talk_. You'll learn a heap.