I am not sure about WhatsApp chatbot integration with Qlik Sense but here is something which you can take a look upon www.crunchbot.ai
They have built the spectacular chatbot called CrunchBot which is exclusively built to work with Qlik Sense.You can use CrunchBot in major channels like Slak, Web chat, SFB, and Teams. Also, they have built a Qlik Sense extension which eliminates the need of any chat platform.
Along with this, they do have a web chat option as well using which you can integrate the runchBot to your organization website or a portal.
In fact, they are way ahead with chatbot stuff. Give it a try.