Wear OS smartwatches now support WhatsApp. A stable version of WhatsApp is now available for Wear OS smartwatches. This is a good development with a week-to-Samsung unpacked event where the Galaxy Watch 6 series would be unveiled.
How to install WhatsApp on Wear OS smartwatches: first you must have a Wear OS 3 smartwatch. You can reply to messages, send voice messages, use emoji, and take calls from your wrist. There’s also support for quick replies.
And if your Wear OS 3 smartwatch supports a cellular network, then you can do all messaging, calls, etc. without having your phone nearby and connected to your watch.