Duplicate contacts in iCloud following Big Sur upgrade

Thanks, I did. What threw me off was the statement:

Before you begin

• If you see duplicates in Contacts on iCloud.com, visit Apple Support for help.

As I did see the condition in iCloud, I tried to find a way to contact Apple Support, which of course did not work.

However, it turned out that this was a useless statement as the ordinary functionality:

Look for Duplicates.

Worked perfectly ! Problem solved.

Thanks.