It’s useful to test on a desktop PC first using VLC. VLC supports HLS so you can use the same URL as you did on the iOS device.
Do you see the same behavior if testing this way?
What Manufacturer and model of IP camera is being used?
Is the Wowza Transcoder AddOn being used to produce the stream?
What guide (link?) did you use to setup?
To setup Wowza to restream IP cameras we recommend following
this guide:
https://www.wowza.com/docs/how-to-re-stream-video-from-an-ip-camera-rtsp-rtp-re-streaming
and also review and try the suggestiions in the troubleshooting section of the guide here:
https://www.wowza.com/docs/how-to-re-stream-video-from-an-ip-camera-rtsp-rtp-re-streaming#cameraSpecific
The HLS protocol used to stream to iOS devices does have a built-in delay, but can be reduced by increasing the keyframe interval
of the video and using these parameters to change the packetization parameters for HLS:
https://www.wowza.com/docs/how-to-configure-apple-hls-packetization-cupertinostreaming
Daren