Received message "Your iCloud will be deleted in one month" on my iPhone

You are likely seeing a scam or phishing message, designed to make you believe you have an issue, which you don't have, in the hopes you will pay for something you don't need. Apple will never send you a message that your iCloud will be deleted in one day. EVER.

Read this --> Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

Ps: I get about 10 of these scam messages a day. I block them, then delete them and go on with my day.

Where does it say that?

My iPhone usually filters them, but not the watch. :(