ios – How to send a communication notification locally, without Push server?

I’m struggling to send a communication notification (with the sender’s avatar and his name). I’m making a client application for a third-party site where sending Push notifications is not implemented. As a result, I use local notification sending. I found very little information on the Internet about these notifications, but the code I found doesn’t work for me.

The question is, can communication notifications be sent only through Push notifications? If so, this issue can be considered closed. If not, why do I have a regular notification sent, although I turned on the necessary Capabilities and added Message Intent to Info.plist.

To clarify, I don’t have a backend server. I’m just asking if notifications with an avatar and contact name (communication notifications) work only for Push notifications? I can’t send a push, only a local notification. BUT I can’t style the local notification under the message style with the contact name and avatar.

func didReceive(
    request: UNNotificationRequest,
    withContentHandler contentHandler: @escaping (UNNotificationContent
    ) -> Void) {
    let handle = INPersonHandle(value: "unique-user-id)", type: .unknown)
    let sender = INPerson(personHandle: handle,
                                  nameComponents: nil,
                                  displayName: "Name",
                                  image: nil, // here you can provide UIImage for user avatar
                                  contactIdentifier: nil,
                                  customIdentifier: "unique-user-id")
    
    let intent = INSendMessageIntent(
        recipients: nil,
        outgoingMessageType: .outgoingMessageText,
        content: "content of message",
        speakableGroupName: nil,
        conversationIdentifier: "unique-user-id-conv",
        serviceName: nil,
        sender: sender,
        attachments: nil
    )
    
    let interaction = INInteraction(intent: intent, response: nil)
    
    interaction.direction = .incoming
    
    interaction.donate(completion: nil)
    
    let content = request.content
    
    do {
        let updatedContent = try content.updating(from: intent)
        let mutableBestAttemptContent = (updatedContent.mutableCopy() as? UNMutableNotificationContent)!
        mutableBestAttemptContent.threadIdentifier = "Thread-identifier" // use this field for grouping notifications
        mutableBestAttemptContent.userInfo = request.content.userInfo
        
        contentHandler(mutableBestAttemptContent)
        
    } catch {
        // Handle errors that may occur while updating content.
    }
}