Why aren’t the tier prices in TierPrice showing including tax?

I’m trying to include taxes on our website’s catalog and we use tier prices or “customer group prices” on most of our products.

I added all the configurations to display prices INCLUDING taxes but the tier prices seem to keep excluding taxes.

I can see the regularPrice in ProductPrices correctly displaying the tax calculation but not for the tier prices.

For more context: the “regular” price of this product, excluding tax, is 0,82 €.

here’s its response object:

{
  "price": {
    "regularPrice": {
      "amount": {
        "currency": "EUR",
        "value": 0.975801,
        "__typename": "Money"
      },
      "__typename": "Price"
    },
    "__typename": "ProductPrices"
  },
  "price_tiers": [
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.82,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    },
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.55,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    },
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.35,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    },
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.3,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    },
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.25,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    },
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.19,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    },
    {
      "final_price": {
        "currency": "EUR",
        "value": 0.18,
        "__typename": "Money"
      },
      "__typename": "TierPrice"
    }
  ],
}

as i said above, regularPrice displays the correct tax-including price so: 0.975801. While the tier prices remain tax-excluded.

Can anyone help me figure this out?
Thanks