You may get better and prompt responses if you kindly provide your iPhone Model and the iOS version if it is known to you and re-post.

Here are some common culprits behind AirPlay woes:
- Network Blues: Ensure your iPhone and AirPlay devices are on the same stable Wi-Fi network. Weak or choppy connections can disrupt AirPlay.
- Outdated Software: Keep your iPhone and AirPlay devices updated with the latest software to avoid compatibility issues.
- Signal Interference: Move your AirPlay devices closer to your router and away from electronics that might be jamming the Wi-Fi signal.
- Router Roadblocks: Check your router settings and ensure multicast and UPnP are enabled. AirPlay relies on these for smooth operation.
- Network Overload: Too many devices hogging your Wi-Fi can lead to AirPlay malfunctions. Try disconnecting some devices or consider a router upgrade.
- Device Hiccups: If all else fails, resetting your AirPlay devices to factory settings can sometimes resolve software glitches.
Are you still stuck? If none of these solutions work, Apple Support can help diagnose the problem. They might uncover a deeper issue specific to your devices.