How to disable Engage Lite
If you don't want your employees to engage via the Engage Social Feed app right now, then click on the three dots next to the Add App button on the top right of Workspace, and click on App Availability like this.
Then navigate to the Engage Social Feed app and uncheck the Available option.
You then save changes and this applies to all users.
You can always make the app available again later if you change your mind.