Thanks for the response Carlos, As a Content Admin I will not be able to share a sheet created by another user. The only person who is able to do this would be the user who created the sheet, Is that correct or I should be able to update this on my end.
Mohamed as content admin you should be able to publish a sheet created by another user. The creator of the sheet would be able to publish as well if you granted rights to publish in the QMC. It would be available to other users with access rights to the app. If you want to make it available to only a single user you probably will need to configure and apply section access security in the app.