How do I reset my forgotten iCloud password?

Here is how to reset an Apple Account password: If you forgot your Apple Account password - Apple Support

Reset your Apple Account password on the web

You can also regain access to your account by resetting your password on the web. When possible, the web browser will redirect you to a trusted device instead.

If you don’t have a trusted device, you can still reset your password on the web — but the process may take a little longer. If you’ll have access to one of your trusted devices soon, it may be faster and easier to reset your password at that time.

Reset your password at iforgot.apple.com