Google analytics GA4 - Total Revenue shows 0,00€

Question

In the Reports under events I can detect that the purchase event is being sent successfully, however the total revenue portion appears at 0.00.

The project was developed in angular and I am using the angulartics2 library. All the other events are being reported.

The code that is being sent is:

let galayer:any = [];
galayer.push({
'item_id': this.cart[index].iditem,
'item_name': desc,
'price': pval,
'item_brand': brand,
'quantity': this.cart[index].quantity,
'item_category': cat,
'item_variant': color
});
    this.angulartics2.eventTrack.next({
        action: 'Purchase',
        properties: {
            label: 'Purchase',
            currency: "EUR",
            content_type: 'product_group',
    value: obj.total,
            "event":"Purchase",
            gtmCustom:{
                'ecommerce': {
          'click': undefined,
          'add': undefined,
          'checkout': undefined,
          'detail': undefined,
          'impressions': undefined,
          'remove': undefined,
                    'purchase': {
                        'actionField': {'transaction_id': obj.number, 'currency': 'EUR', 'shipping':this.shippingTotal,'value':obj.total},    // 'detail'
                        'items': galayer,
                     }
                 }
            }
        }
    });