Chromecasts used to have a free kiosk mode that could boot up to a full screen webpage, then Google gated it behind a monthly device management fee. :(
It was cool because you didn't even need another device to run the browser, everything ran on the chromebit/chromebox.
If you want something that is more of a static kiosk setup, there is a different Balena supported project that supports more of this style use case. Without the need of casting or connecting with Airplay
I'll never touch Balena anything since they put phone-home in Etcher (a simple tool for writing a local file to a local
flash blockdev, essentially just a GUI front end to dd). I can't spend the time to audit their software for spying, and they already burned up whatever default level of trustworthiness they had.
It was cool because you didn't even need another device to run the browser, everything ran on the chromebit/chromebox.