Can you add a fic as unrevealed in a collection that’s filled with revealed works?

Sorry if that doesn’t make sense/is dumb, I wasn’t sure how to phrase it. I have a collection I used for kinktober last year, and I figure there’s no reason to start a new collection since it’s the same fandom. The collection isn’t named by the year, just “kinktober-(my username)-fandom”. I have a few kinktober prompts for this year completed and would like to upload them with all the tags to save them how they’ll be posted, because I’m worried I might forget some lol. And it’s too far out from October to leave them as drafts because they’ll delete.

Before I try to do this and fail, IS it possible to post a work as unrevealed to a collection that’s revealed? Or does EVERYTHING need to be unrevealed?