my Apple Watch is telling me to set up home kit on my iPhone, it is already set up.

Hi RachelleSher,

Thanks for posting in Apple Support Communities! If you continue to see the message after setting up HomeKit, try restarting both devices. A restart can resolve many issues:

Restart your iPhone

Restart your Apple Watch

Should it continue, check to ensure both devices are running the latest software versions.

Update your iPhone or iPad

Update your Apple Watch

Hope that helps!