Salutations tjdeloia,
We understand that you’d like to remove or merge some duplicates in your iCloud contacts. Since those duplicates are not on your Mac but are appearing on the iCloud website, iPad and iPhone we’re going to recommend that you reach out to Apple Support for assistance. That is outlined in the following article as well - If you see duplicate contacts after setting up iCloud Contacts
Here’s a link to connect with Apple Support - Apple Support
There is an option in iOS and iPadOS 16 to resolve duplicate contacts. You could try that on one of the devices and see if the changes sync with iCloud.
Get rid of duplicate contacts on iPhone
Get rid of duplicate contacts on iPad
Thanks.