WooCommerce can't see product variations

I’m trying to manage WooCommerce entirely by its REST API but with no luck, i’m trying to insert a product with variations

• I can succesfully create a product with a POST to {{url}}/wp-json/wc/v3/products/
• After product creation, i have to create its variations with a POST to a separate endpoint to {{url}}/wp-json/wc/v3/products/{{product_id}}/variations, this works too
• I can see the product variation created with a GET in {{url}}/wp-json/wc/v3/products/{{product_id}}/variations and its own GET {{url}}/wp-json/wc/v3/products/{{product_id}}/variations/{{variation_id}}
• I can correctly see the rows created in the wordpress database
• All calls are a 201 with the expected object as response

However, i’m not able to see any product variations on the woocommerce product page

What i found its that a product with variations that work have an array variations which contains the variations ids, but when i create a product with API the array of the product created is empty, this would explain why i’m not able to see any product variation on the product page.

This is a sample of product variation that I create:

{
"regular_price": "225",
"status": "publish",
"manage_stock": true,
"stock_quantity": 1,
"stock_status": "instock",
"image": {
  "src": "https://via.placeholder.com/150"
},
"on_sale": true,
"shipping_class": "1",
"attributes": [
  {
    "id": 2,
    "name": "Color",
    "option": "Red"
  },
  {
    "id": 3,
    "name": "Size",
    "option": "Xl"
  }
]}

I was not able to found a similar issue, any thoughts?

{
    "name": "Sample Product",
    "type": "Example",
    "description": "A Demo Product",
    "images": {
        {
            "src": "path/to/img",
            "position": 1
        }
    },
    "categories": {
        {
            "id": 12
        }
    },
    "attributes": {
        {
            "id": 2,
            "name": "Color",
            "variation": true,
            "visible": true,
            "options": [ 'Red', 'Green', 'Blue' ]
        },
        {
            "id": 3,
            "name": "Size",
            "variation": true,
            "visible": true,
            "options": [ 'M', 'L', 'XL' ]
        }
    }
}