From WhatsApp News: Voice and video calls on WhatsApp are end-to-end encrypted, so WhatsApp can’t hear or see them, whether you call from your phone or your computer. We’re starting with one-to-one calls on the WhatsApp desktop app so we make sure we can give you a reliable and high-quality experience. We will be expanding this feature to include group voice and video calls in the future,” the company said in a statement.
Whatsapp said that desktop calling is supported on:
-Windows 10 64-bit version 1903 and newer