Possible Scam Email?

It is a scam. You can hover over the link in the email to see the actual email address that it came from. Another indicator is the line "secure your account via the link below to provide a report to the developer". Why would you provide a report to the developer?

You can review this support article to identify phishing scams and report them.

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

You can also use this link to verify the devices signed into your Apple ID.

Check your Apple ID device list to find where you're signed in - Apple Support

Good for you for not clicking the embedded link and entering your personal information.

LiaInvictus wrote:

I thought as much; thank you. (I had originally provided the full email address of the sender, but that apparently is not permitted.)

I saw the email was redacted. Sometimes the email in the from field will show a name or address that is different when you hover over to reveal the actual address. That is how it works in Safari, but other browsers may require a Control-Click. In some of those scam emails, the actual address will be a gmail, hotmail, or another domain name.