LWC: Apex-defined ouput variable only storing 1 record

I have a LWC that is embedded inside a screen flow. The component shows a datatable with records of Order object and I want to keep the records that the user has selected (with a checkbox) in the table in a wrapper in order to pass that information back to the screen flow and later to a subflow. I have created the wrapper, an Apex-defined variable in the flow and as I can see in the debug the variable only stores 1 record.

JS function

getSelectedOrderWrappers() {
        return this.orderSelectedRows.map(selectedRow => {
            const order = this.ordersEdited.find(o => o.Id === selectedRow.Id);
            if (!order) return null;

            return {
                OrderNumber: order.OrderNumber,
                Product_Business_Unit: order.Product_Business_Unit__c,
                Product_Name: order.Product_Name__c,
                PublisherIO_ID: order.PublisherIO_ID__c,
                EffectiveDate: order.EffectiveDate,
                EndDate: order.EndDate,
                Order_Planned_Qty: order.Order_Planned_Qty__c,
                Order_Planned_Purchased_Qty: order.Order_Planned_Purchased_Qty__c,
                Total_Net_Budget_Planned: order.Total_Net_Budget_Planned__c,
                Total_Net_Budget_Delivered_Billing: order.Total_Net_Budget_Delivered_Billing__c,
                Top_Up_Sales_Qty: order.Top_Up_Sales_Qty__c
            };
        }).filter(Boolean);
    }

Selected rows handler

handleOrderRowSelection(event) {
        const selectedRows = event.detail.selectedRows;
        this.orderSelectedRows = [...selectedRows];
    }

Wrapper

global with sharing class TopUpLineGroupsWrapper {
    @AuraEnabled public String OrderNumber;
    @AuraEnabled public String Product_Business_Unit;
    @AuraEnabled public String Product_Name;
    @AuraEnabled public String PublisherIO_ID;
    @AuraEnabled public Date EffectiveDate;
    @AuraEnabled public Date EndDate;
    @AuraEnabled public Decimal Order_Planned_Qty;
    @AuraEnabled public Decimal Order_Planned_Purchased_Qty;
    @AuraEnabled public Decimal Total_Net_Budget_Planned;
    @AuraEnabled public Decimal Total_Net_Budget_Delivered_Billing;
    @AuraEnabled public Decimal Top_Up_Sales_Qty;

    global TopUpLineGroupsWrapper() {

    }
}