If you're looking to Download Splitscreen on your Chromebook laptop Then read the following guideline.

Splitscreen lets your share an extra Mac display to your Apple Vision Pro.  Expand your virtual Mac displays to support more than one display and improve your productivity while working on Apple Vision Pro. Work with multiple documents at the same time, or multitask between different apps. Increase the screen real estate of your Mac across multiple windows, even if the Mac and Apple Vision Pro use different Apple IDs. Features: - Supported resolution between 1280x720 and 2560x1400 (more resolutions coming soon) - High Refresh Rate (60 frames per second) - Works alongside Mac Virtual Display or separately - Mirror Macs signed into another iCloud account - Vote on new features you want to see on the roadmap - View realtime connection stats such as fps, bitrate and delays to optimise performance