Swift Core Data Insert doesn't fail, but doesn't get inserted

I am returning JSON from a remote server using the Result Type in Swift 5.

I've tried all kinds of things, but it just won't save. Any help would go a long way.

The data is returning from the server just fine. URLSession.shared.jsonDecodableTask is a snippet I found on SO.

newData has all the correct values.

My code looks as follows:

URLSession.shared.jsonDecodableTask(with: urlComponents.url!) { (result: Result<MyDataRoot, Error>) in
            switch result {
            case .success(let response):
                
                let managedContext = self.appDelegate?.persistentContainer.viewContext

                var count: Int = 0
                for d in response.data {
                           let newData = NSEntityDescription.insertNewObject(forEntityName: "NewEntity", into: managedContext!)

                            newData.setValue("val1", forKey: "prop1")
                            newData.setValue("val2", forKey: "prop2")
                                                        
                                      do {
                                          try managedContext?.save()
                                         count += 1
                                      } catch {
                                          print("Error saving context: \(error)")
                                      }
                       
               }
        
            case .failure(let error):
                print("Failure: \(error)")
            }
        }.resume()

I also printed out the location of the db using the following:

#if os(iOS) && targetEnvironment(simulator)
        // New variable location for iOS Simulator Filesystem...
        if let last = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last {
            print("Documents Directory: \(last)")
        }
        #endif