Some Intel drivers break Miracast. If updating doesn’t help, try Roll back driver (if available) to an older version.
This article will walk you through exactly what Miracast is, why Windows 11 is rejecting it, and—most importantly—how to fix it. your device doesn t support miracast windows 11
The most common culprit isn't that your hardware is broken; it's that Windows 11 has raised the bar for what qualifies as "compatible." Some Intel drivers break Miracast