I have found this discussion on Quora - add an HTML code to my website so that when people click it, opens a WhatsApp conversation.
I am also ging to try this at my end.
Let's see if something works.
Yes, linking a button is pretty and working.
And we can definitely expect such behavior by an apple product.
clicking on mac leads to the error page, but two back arrows in history leads tom whats app as well but is still not clickable.