Hi, let me take a quick look at the codebase and get back to you on this.
It means azure_cdn_profiles won’t be synced for that subscription (9d2...) only. It’s because the subscription doesn’t seem to be registered for the microsoft.cdn namespace.
This means the CDN provider is not enabled for your Azure subscription. See more about enabling it in Microsoft Docs.
If it’s not enabled, you probably don’t have any resources in it, which is why it’s a warning. You can enable it to get rid of the warning if you’d like, but I don’t expect the sync to find any resources under it.