Health Kit Background Delivery and URLSession.shared.dataTask

Hello. I have implemented background delivery for detecting changes in health kit with HKObserverQuery. It works well, I am reading changes. And I am sending this changes to an https endpoint with using an URLSession.shared.dataTask inside the HKObserverQuery callback while my app is terminated. I have several questions about this:

1. Is starting a URLSession.shared.dataTask inside HKObserverQuery callback is correct way to do it?
2. I am calling HKObserverQuery completion handler whatever dataTask returned success or failure but I am wondering what if the network connection is low and this dataTask response could not received in 2-3 seconds. I have read HealthKit background deliveries should take 1-2 seconds.

Should I use background task somehow for sending those HTTPS requests?