Phishing email

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

including the following from that link:

Please report suspicious emails and messages: 

• If you receive a phishing email that's designed to look like it’s from Apple, send it to reportphishing@apple.com. Ifyou forward a message from Mail on your Mac, include the header information by selecting the message and choosing Forward As Attachment from the Message menu.
• To report spam or other suspicious emails that you receive in your iCloud.com, me.com, or mac.com Inbox, send them to abuse@icloud.com.
• To report spam or other suspicious messages that you receive through iMessage, tap Report Junk under the message. You can also block unwanted messages and calls.

I think they were trying to scam you into purchasing something. Maybe not though. Regardless the information below may be useful to you.

Increase/learn about security

See If you think your Apple ID has been compromised https://support.apple.com/en-us/HT204145

Increase the Security of your Apple ID https://support.apple.com/en-us/HT201303

iCloud security overview  https://support.apple.com/en-us/HT202303

Ways to keep your information safe on Mac https://support.apple.com/en-gb/guide/mac-help/mh11402/mac

Information on Phishing, etc.

 See If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement https://support.apple.com/en-us/HT201382

See Identify legitimate emails from the App Store or iTunes Store https://support.apple.com/en-us/HT201679

See How to avoid scams when using Apple Pay to send and receive money https://support.apple.com/en-us/HT208226

For scam related information from Apple including reporting scams to Apple see Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams https://support.apple.com/en-us/HT204759