Also worth noting is that WhatsApp uses Open Whisper Systems/Signal’s’ encryption protocol, and that one of the creators of WhatsApp, Brian Acton, initially moved to Facebook when the app was acquired, but ultimately left due to disagreements with Facebook, and started the non-profit Signal Foundation with Moxie Marlinspike. WhatsApp - Wikipedia and Signal Foundation - Wikipedia.
Still, I would never in a million years use any product owned by Meta/Facebook, or even touch their websites. I hope that eventually, WhatsApp will divest from Meta, or be forcibly divested.