no me llegan las notificaciones del WhatsAap al watch y no se como

Have a look at the related article from the WhatsApp Support page, explaining the settings needed:

Acerca de WhatsApp para Apple Watch - WhatsApp FAQ's

Did you already force restart your iPhone and Apple Watch after the latest updates?

Force restart iPhone - Apple Support

To force restart your watch, press and hold the Digital Crown and the Side button together for about 10sec, until the Apple logo comes back again.

If you would prefer to troubleshoot in your own language, you can post your question to the forum linked below.

Si prefiere solucionar el problema en su propio idioma, puede publicar su pregunta en el foro vinculado a continuación.

Comunidad de soporte de Apple oficial