Bulk Subscribe Profiles endpoint not creating profiles if not found

Hi there!

I am using the Bulk Subscribe Profiles API endpoint: https://developers.klaviyo.com/en/reference/bulk_subscribe_profiles

I have noticed that it doesn’t create a profile when subscribing with a person’s email address that doesn’t exist as a Klaviyo profile. The documentation mentions that: If a profile cannot be found matching the given identifier(s), a new profile will be created and then subscribed. I get a 202 status code in my response, but I don't see the person's email address added to my list.

Is there a mistake in my request or is there certain conditions that need to be met to create a profile before subscribing them to a list?

Here is my request:
Request: POST https://a.klaviyo.com/api/profile-subscription-bulk-create-jobs

{
  "data": {
    "type": "profile-subscription-bulk-create-job",
    "attributes": {
      "historical_import": false,
      "profiles": {
        "data": [
          {
            "attributes": {
              "email": "example+123@contact.com",
              "subscriptions": {
                "email": {
                  "marketing": {
                    "consent": "SUBSCRIBED"
                  }
                }
              }
            },
            "type": "profile"
          }
        ]
      }
    },
    "relationships": {
      "list": {
        "data": {
          "type": "list",
          "id": "SmXX9X"
        }
      }
    }
  }
}

Any insights or examples would be greatly appreciated! Thank you for your help.

Best,
-Amanda