Often caused by outdated Wi-Fi or Graphics drivers. Reviewers suggest checking dxdiag to verify hardware support.
If you are projecting to another PC and want to use its mouse/keyboard to control the source, you must check the box for "Allow mouse, keyboard, and other input" in the connection settings. Improve Wireless Display reliability in Windows 11? enable miracast windows 11
Press Win + K . If you see “Connect to a wireless display” but no devices appear, your PC might still support it but the receiver is missing. Often caused by outdated Wi-Fi or Graphics drivers
If supported, a "Cast" sidebar appears instantly, allowing you to connect to smart TVs or wireless adapters without extra software. a "Cast" sidebar appears instantly