.
The intention of the EU is clearly to have iMessage, the part that handles instant messaging over WiFi, be compatible with other such apps, like WhatsApp. I am not a lawyer, such a loophole may very well exist, but it is frankly foolish to believe EU will back down if WhatsApp for example adds SMS support and calls it a day. I expect the EU to see their intention through.
No, WhatsApp doesn’t.