Cosmos is designed so that you can open cases in browser tabs. For any link to a case that calls Open Work, try right clicking and selecting "Open in new browser tab."
As a more detailed example, suppose you're showing a list of cases in a Table (tabular data). One of the cells calls Open Work. You can right click and open in new browser tab, which lets you work on that case in a separate browser tab. Your original tab with the tabular data stays the same.
Here I am trying to open different items from navigation menu. Like we have Home, Dashboard, MyWork etc. we have added some menus to it and the users should be able to open those menu items parallelly and can work on it.
Earlier in UIKit as we were able to do that as in tab layout but I see that it is deprecated now and if we use the deprecated layout then the cosmos OOTB preview option for work items doesn't appear.