is it possible to reverse engineer how a website and chatbot for FB msg are integrated?

I am still learning how to make chatbots but I keep hitting walls and don’t even know what to look for for help. Is there a way I can “debug” or “inspect” the site to figure out what or how I should be trying to move forward?

I have dabbled with dialogflow and integrated it with fb developer msg but now I have no clue how to create the multiple choice popup options you see in fb msg. The 2nd hurdle I can’t wrap my brain around is how to link the users to unique flows based on what they click on in my website.

p.s. I tried messaging, emailing and contacting the site owners through social media a few times over the last 4 months but I have not received any response. I am just looking for some direction.