Using Parallels Secure Workspace in Google Chrome's "Application mode" on Microsoft Windows

Resolution

Keyboard input is processed and used in the order below.
If it's picked up at a higher point in this list; the next candidates in this list never receive this input.

1. The Operating System.
2. The browser.
3. The Workspace.

On the end user's device, create a shortcut and specify this location:

"path\to\chrome\chrome.exe" --app=https://your.workspace.env  

 For example:

"C:\Program Files\Google\Chrome\Application\chrome.exe" --app=https://your.workspace.env

 Then, have the end-user launch the Workspace using this shortcut.