can we use chromecast to watch apple tv

You can’t stream Apple TV+ content from one device to another using the Google Cast (formerly Chromecast) protocol. Apple prefers AirPlay for such streaming. List of AirPlay 2-enabled smart TVs - Apple

You can install the Apple TV app on a 2020 ‘Chromecast with Google TV’ streaming device. All the ways to watch Apple TV+ - Apple Support. Watch on Google TV - Apple Support.

Hello lmettinger13,

Thanks for reaching out through the Apple Support Communities about using the Apple TV app via Chromecast.

It looks like you've had the chance to review the related article above.

It doesn’t appear that Apple TV is listed in this resource: Chromecast Enabled Apps

So you’d want to reach out to Google to get further assistance: Chromecast Help

They’d be in the best position to verify what apps they support.

Take care.