I can help you @Yudong Li and I’m sorry for your frustration. Safari on your iOS 13 will play back our stream, but it will not be the low latency stream.
With the new LL-HLS support from Wowza, it still means you will need to do some work on your end as far as building an iOS app accessing the native player. LL-HLS is still so very new to the industry and this isn’t a straight out of the box workflow and you won’t be able to play it back on the the native player on your iPhone 13.2.3 without a custom app.
You’ll need to build a playback app and also get permission from Apple for that app to allow for LL-HLS playback. There is a beta handshake that is required and you can only get access to that through Apple Developer program.
Hope that helps…