The error "Your device doesn't support Miracast" is often a lie. Your software supports it just fine. The problem is the radio in your computer.

"Your device doesn't support Miracast" in Windows 11 often indicates a software configuration issue rather than a total lack of hardware capability Microsoft Learn

On a rainy Sunday, Mia built a slideshow of last year’s photos and invited her parents over. As the images played full-screen on the TV, interleaved with the soft patter of rain, she felt a small pleasure—practical, quiet, complete. Technology, she thought, was less about the promises printed on packaging and more about how you responded when it refused. The message had been blunt, but it had led to an afternoon of curiosity, an evening of friends, and a new willingness to tinker.