Future Posts in Image Slider?

I am creating a site where each day (Mon-Friday) I will have a new, planned post up. I have an image slider at the top of the site and I want to be able to have all 5 posts in the image slider, but I don’t want people to be able to access them until I “activate” them. I want people to be able to look through the image slider and see what posts will be up in the following days without being able to view them. Is there any kind of plugin or code I can use to get this to work?

The theme I am using: https://jinsonathemes.com/demo/?themedemo=deltared
https://www.web2feel.com/deltared/

Thanks.