Chromecast or TV with Google Cast isn't showing in the Netflix app
Note: If you can't find the Cast button anywhere in the Netflix app on your mobile device, follow these troubleshooting steps instead.
After you tap the Cast button , you may need to tap Allow to let Netflix find and connect to devices on your local network. If you tap the cast button , but aren't seeing your Chromecast or the TV that works with Google Cast, it means a setting or network issue is stopping Netflix from finding your device on your Wi-Fi network.
To fix the problem, follow the steps for your device.
Turn off your device. If your device has a power cable, unplug it.
Make sure your device is completely off, not just in sleep or standby mode.
Leave your device off for 15 seconds.
Turn on your device and try Netflix again.
To allow Netflix to find the Chromecast or TV on your local network:
Open Settings.
In the list, find and tap Netflix.
Make sure the Local Network setting is turned on.
Open the Google Home app on your iPhone or iPad. If you don't have it, you can get it from the App Store.
In the lower left, tap the Home icon, then scroll down to find your Chromecast.
If you can't find your Chromecast, or it shows as Offline, make sure it's plugged in and connected to the same Wi-Fi as your iPhone or iPad. For help, follow Google's steps to connect your Chromecast to the right network.
If your Chromecast appears as On, it's on the right network.