Hi @Proctorw,
Thanks for the post.
Can you please specify the issue you are experiencing? Is your Roku device connected to the same wireless network as your Roku device? Try removing the app from your iPhone 14 and go to the App Store and download it again and see if that helps resolve the issue you are seeing.
For more information about Airplay, visit our Support page here: Screen mirror your Apple device with AirPlay
With more detailed information, we will be able to assist you further.
Warm Regards,
Lianna