Hi Бобровский, hope you're doing well. I'm Ian, and I'm happy to help you today.
Go to Settings > System > Projecting to this PC, and check the settings there. Make sure it’s set to “Available everywhere” or "Available everywhere on secure networks"
If it doesn't work, even though Dxdiag shows “Miracast: Available, with HDCP”, it’s possible that your hardware or drivers don’t fully support Miracast. It might be a good idea to reach out to MiracastSupport for further assistance.
Or you might need a wireless display adapter to connect to Miracast.
This is a user-to-user support forum, and I am a fellow user.
I hope this helps, but please let me know if you need anything else.