IOS sharing via Airplay / screen mirroring requires network and computer firewall settings.
If you can not share with Airplay,
Make sure that the following ports are open and your application is allowed access:
|TCP||AirPlay||5000, 7000, 7100, 50000, 7200-17210|
Windows Desktop Firewall
Also make sure that you can access the following applications:
|Airhost.exe||Airhost.exe Type: TCP||Allow all|
|Airhost.exe||Type: UDP||Allow all|