my code on the client side looks like:

func getRequest() {

    let server = appState.server + "endpoint"
    let package = CustomObject(param1: val1, param2: val2)
            
    guard let url  = URL(string: server) else { return }

    var urlRequest = URLRequest(url: url)
    
    urlRequest.addValue("application/json", forHTTPHeaderField: "Content-Type")
    urlRequest.addValue("application/json", forHTTPHeaderField: "Accept")
    
    urlRequest.httpMethod = "GET"
    
    guard let data = try? JSONEncoder().encode(package) else { return }
            
    urlRequest.httpBody = data

    let task = URLSession.shared.dataTask(with: urlRequest) {
        (data, response, error) in
        if let error = error {
            return
        }
        guard let data = data else { return }
        guard let dataString = String(data: data, encoding: String.Encoding.utf8) else { return }
        let jsonData = Data(dataString.utf8)
        DispatchQueue.main.async {
            print("dataString is found and it's \(dataString)")
        }
    }
    task.resume()
}

On the server side:

app.get('/endpoint', function (request, response) {
  console.log("THIS SHOULD PRINT")
  //do stuff with request.body
  start()
  response.send('GET request to the homepage')
})

For some reason, the GET endpoint isn't being reached, so nothing is printing. Not sure what I'm missing on the client side set up.