This is a user-to-user technical support forum. The volunteers here do not have any control over what Apple does, nor what Meta (aka Facebook) does.
It is Meta's product. It is Meta's responsibility to fix any bugs in it. There are a few million apps in the App store. Apple cannot handhold every developer that has an app that is not working correctly.
Instead of telling people that have no control over the Apple Watch software, nor the WhatsApp software, you should be focusing on telling Meta that there is a problem with WhatsApp.
If Meta finds there is an issue with the Apple Watch software, Meta is big enough to contact Apple and work with them to fix things. The volunteers here do not have that kind of clout.