How do I fix this device doesn't support Miracast?
Make sure your device drivers are up to date and the latest firmware is installed for your wireless display or adapter (see the support info on the manufacturer's website for instructions or search Microsoft Store for your manufacturer's app to help you). Restart your PC and the wireless display or adapter.
How do I add Miracast support?
Questions and Answers about Miracast
Open CMD and type “netsh WLAN show drivers” to check the status of Wireless Display Supported. If it says, 'Yes', then it means your PC supports Miracast. Another way to check it is by opening the 'Connect' App and using the Connect to a wireless display option.
Why can't i connect to Miracast?
Can I cast without Miracast?
How do I know if my device is Miracast compatible?
Is Miracast Bluetooth?