Oops, I missed that in your OP. Support is likely busy. It's only been a few days, not counting the weekend. Either way, your game was probably flagged automatically for some reason, but not because it's NSFW.
As for the itch.io search feature, it's only a convenience, not a marketing tool. My personal advice is to be more active in the community. There are plenty of people here interested in games like yours. Talk to them.