How to detect free days trial for subscription in android (promo offer)

I followed that documentation

https://www.revenuecat.com/docs/subscription-guidance/subscription-offers/google-play-offers

I have a renewable subscription in my app and I created a bunch of promo codes. Then I redeemed that code which offered me 14 free days of usage of my app.

The problem is that in the overview chart it shows that purchase as a normal one

According to the docs it should be a trial? I can deduce that promo code was used by looking at revenue column, not sure that’s the correct way to identify promo codes?

Additionally I thought that offer_code field is going to be populated, but it’s not.

That’s the json, I have received via web hook

{
  "api_version": "1.0",
  "event": {
    "aliases": [
      "<removed>"
    ],
    "app_id": "<removed>",
    "app_user_id": "<removed>",
    "commission_percentage": 0.122,
    "country_code": "PL",
    "currency": "PLN",
    "entitlement_id": null,
    "entitlement_ids": [
      "full_access_subscription"
    ],
    "environment": "SANDBOX",
    "event_timestamp_ms": 1740045029955,
    "expiration_at_ms": 1741254604897,
    "id": "<removed>",
    "is_family_share": false,
    "metadata": null,
    "offer_code": null,
    "original_app_user_id": "<removed>",
    "original_transaction_id": "<removed>",
    "period_type": "NORMAL",
    "presented_offering_id": null,
    "price": 0,
    "price_in_purchased_currency": 0,
    "product_id": "full_access_subscription:monthly-subscription",
    "purchased_at_ms": 1740045005693,
    "renewal_number": 1,
    "store": "PLAY_STORE",
    "subscriber_attributes": {},
    "takehome_percentage": 0.85,
    "tax_percentage": 0.187,
    "transaction_id": "<removed>",
    "type": "INITIAL_PURCHASE"
  }
}

Shouldn’t the type be “TRIAL” ?

Is that expected behaviour ?

I use quite recent version of react-native-purchases - 8.5.4