Hi

To mirror your iPhone to Chrome OS, you can use Screen Mirroring App. Its use is simple, just follow these steps:

Download Screen Mirroring App on your iPhone from the following link https://apps.apple.com/us/app/screen-mirroring-app/id1463795505#?platform=iphone

On your Chromebook, open your web browser and go to http://mirroring.tv/. A QR code will appear on the screen.

Open Screen Mirroring App. Tap Scan and point to the QR code. Select Watch ad. Then, tap Screen Mirroring > Start Broadcast and voila! Your iPhone screen will appear on your Chromebook.