How to add custom product and package titles or description?

Hello, I have a offering where I put a custom description - 

Annual package with 7 day free trial

And then I added DisplayName for product as well 

Monthly package item

None of these fields were reflected in my api call, here is what I got instead:

    {
      "packageType": "MONTHLY",
      "product": {
        "title": "Pro Monthly",
        "identifier": "pro_monthly",
        "currencyCode": "GBP",
        "discounts": :],
        "productType": "NON_CONSUMABLE",
        "description": "Monthly subscription to access pro features",
        "priceString": "£14.99",
        "subscriptionPeriod": "P1M",
        "productCategory": "SUBSCRIPTION",
        "price": 14.99,
        "introPrice": null
      },
      "identifier": "$rc_monthly",
      "offeringIdentifier": "default"
    },

Why is all of my custom data missing from this product?

To make it more confusing this product has a description:

Monthly subscription to access pro features

Yet in the dashboard description isn’t even included as a option that you can edit:

Identifier
pro_monthly

Platform
App Store

Display Name
Monthly packet

Created
2023-11-02 05:33 PM UTC