Hey Werner ,
Thanks for reaching out to us!
That's an interesting use-case, we actually hadn't think about that yet. We currently do not yet allow links in our WhatsApp widget.
We'll make sure that links will work and open in a new tab in our next update. Make sure to write links in Markdown, just like italic and bold. Below you can find an example.
I'll update you as soon as links are working. I expect the update later this week or beginning next week 🙂