No push notifications on ios?

Describe the bug

I'm new to ntfy and recently installed the iOS app (version 1.3 (4)) on iOS 18.3.2. I subscribed to a topic and then published a message using curl -d "hi" ntfy.sh/mytopic, but I did not receive any notification on the iOS device.

When visiting https://ntfy.sh/mytopic in a browser, I can clearly see the message was delivered. I tested with multiple topics, all yielding the same result.

To investigate further, I deployed a self-hosted ntfy instance on my own server. The messages are correctly published and viewable via the web interface, but again, nothing is received on iOS.

Eventually, I realized that manually pulling down the UI in the iOS app causes the messages to appear — suggesting the client performs a poll on refresh. However, this is not equivalent to push notifications, which I expected.

Components impacted

• iOS app (push notification behavior)

Additional context

Is the iOS app supposed to support native push notifications via APNs or FCM?

Am I experiencing a configuration issue or is this the expected behavior on iOS?