Decodable extension not called Xcode

Question

I am trying to decode the array IGNotification into data that was successfully encoded into a dictionary. Below is my compactMap that should call my Decodable extension, however it looks like my extension is not being called or that the dictionary is not being serialized. Can someone help me as to why this is?

getNotifications function:

public func getNotifications(
    completion: @escaping ([IGNotification]) -> Void
) {
    guard let username = UserDefaults.standard.string(forKey: "username") else {
        completion([])
        return
    }
    let ref = firestoreDatabase.collection("users").document(username).collection("notifications")
    ref.getDocuments { snapshot, error in
        guard let notifications = snapshot?.documents.compactMap({
            IGNotification(with: $0.data())
        }),
        error == nil else {
            completion([])
            return
        }

        completion(notifications)
        print(notifications)
    }
}

Decodable extension:

extension Decodable {
    /// Create model with dictionary
    /// - Parameter dictionary: Firestore data
    
    init?(with dictionary: [String: Any]) {
        guard let data = try? JSONSerialization.data(
            withJSONObject: dictionary,
            options: .prettyPrinted)
        else {
            return nil
        }
        guard let result = try? JSONDecoder().decode(
            Self.self,
            from: data
        ) else {
            return nil
        }
        self = result
    }
}