Is this "unusual activity" message from Apple "Support" a scam?

The messages are scam attempts, presented by criminals. Do not interact with the message or the sender. For information from Apple regarding such bogus messages, please read the information at the link below. 

Recognize and avoid social engineering schemes ... - Apple Support

The old "unusual activity" is a known scam.

Glad they didn’t fool you, Pinkmaryjane!

Important:

If you receive a suspicious email or SMS text message that looks like it’s supposed to be from Apple, please email it to reportphishing@apple.com.

Learn how to ⇢ Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams.

Good luck! 👋🏼😉

You are welcome.