Content-Currency is not working in headers magento2

I am using magento2. The issue i am facing is i want to apply currency filtering. My default currency is USD and allowed currencies are CAD and EUR. When i change the currency from my frontend and pass that in the haeders of query it is not working properly and showing price wrt USD only.

headers: {
        "Content-Type": "application/json",
        "Authorization": `Bearer ${jwt_client}`,
         'Store': `${selected_store}`,
         'Content-Currency': `${selected_currency}`
      },
      body: JSON.stringify({
        query: `
        {
          customerOrders {
            items {
              order_number
              id
              created_at
              grand_total
              status
            }
          }
        }
        `,
        variables: {},
      }),

This is my query. I am getting currency_code. But still it is not setting in headers. Also, in pages like cart and others the headers are setting but i am facing this issue in orders page.