No, if you have posts, they will at some time be visible on your home/front/blog page. But once you add more posts, they will no longer be on the first page.
It is possible that your prepared posts won't appear on the front page if you were to post them as dated in the past.
Can you specify your goal? perhaps there is some other workaround? Sometimes these sort of things are theme dependent. Your blog is private, but it might be useful for volunteers to know which theme you are using.
Besides what I've told you, I am out of ideas.
By the way, thank you for posting in this your original thread. Perhaps some other volunteer has better ideas…