This will be a magisk module intended to:
On the CAT S22 Flip. Other devices may or may not work.
An app is used to manage the secondary display. You can view the source here: https://github.com/B-CyberFunker/CATS22Present N/A
Not yet possible, but it will be: Download the zip and use Magisk to install. Reboot. If you're on the stock ROM or otherwise already have the secondary display enabled, use the "NoScreen" version.
Not required as the module is just a bunch of scripts at the moment. If you want to try the latest and greatest, simply download the zip of this repo and install it.