Replica is a Chromecast-enabled app which lets you mirror your screen from your iOS device to cast-enabled TVs (such as Chromecast, FireTV, Android TV) - might be a good option to try instead of Airplay.
Normally £17.49 a year for the premium version, you can pick up a lifetime premium license for free - which includes:
Custom controls
No advertising
The IAP can be purchased either directly from the store or after opening the app:
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