If you want to work efficiently but the small screen on your iPhone or Windows 11 computer may be hindering your progress, you can always cast it to your Roku TV. It will give you a wider viewing interface without compromising on content.
Screen mirroring feature on Roku devices such as TCL Roku smart TV or Roku Express 4K, has always been effective, however recently, some users find it otherwise. It seems that their Roku casting tool is not working on their Windows 11 PC or iPhone mobile devices.
Let’s find out some of the possible solutions to troubleshoot this problem.
Fixes for Windows 11 PC or iPhone Cannot Mirror or Cast Content to Roku TV Issue

One of the first things you can do is unpair and pair your Roku media player or smart TV and Windows 11 or iOS mobile phone again. Navigate to the Settings menu and head over to the Bluetooth section. Look for your Roku device. If you cannot see it, try to check in Other Devices. Remove your Roku to unpair it. Now, select Add Device and pair your Roku.
Another way is to reset your network. Go to Network & Internet in the Settings menu and select Advanced network settings. Choose Network reset. After reset, set all your adapters and network settings before restarting your computer. In some cases, users no longer turn on their wifi after resetting the network. They try to cast to their Roku device without wifi.
Next, you may also try refreshing the network discovery. Launch the Control Panel and select Network and Sharing Center. Choose Advanced sharing settings. Look for network discovery and turn it off. Save the changes and try to enable it.
You can also update your network drivers. Open Device Manager and expand Network adapters. Right click on your network driver. Click the Update driver option and allow automatic search for updated software. Follow the process and don’t forget to reboot your device.
It also helps to install the latest software updates on your devices including your Roku TV. There are new updates that include improvements and fixes for bugs and errors.
Wrapping Up!
Always a great idea to give it your best shot when it comes to solving problems. Try the methods above and see if they work for you.