Enable screen blackout in Incognito mode
By default, the Google Chrome app doesn't allow our screen blackout feature to monitor the screen when Incognito mode is in use. The screen blackout feature is designed to prevent the accidental viewing of suggestive content on social media apps, although it can be used with any app, including browsers. Here's how you can prevent this:
In the Google Chrome app, type chrome://flags in the URL bar.

In the search bar, type incognito screenshot.

Set Incognito Screenshot to Enabled and hit the prompt to relaunch Chrome.

Now screen blackout will work in incognito mode. If you have other browsers, you may wish to disable or uninstall them to prevent this workaround there.
This will enable any app that uses an Android screencast to view the contents of incognito tabs, and will show incognito tab contents in the app switcher.
Open Chrome Flags
In the Google Chrome app, type chrome://flags in the URL bar.

Enable Incognito Screenshots
In the search bar, type incognito screenshot.

Set Incognito Screenshot to Enabled and hit the prompt to relaunch Chrome.

Finish Up
Now screen blackout will work in incognito mode. If you have other browsers, you may wish to disable or uninstall them to prevent this workaround there.
This will enable any app that uses an Android screencast to view the contents of incognito tabs, and will show incognito tab contents in the app switcher.
Updated on: 07/03/2023
Thank you!