I am not a representative of itch.io - so take what I have to say with a grain of salt.
It takes a few days until a project is indexed, whether it is SFW or not. Your second submission was a few minutes ago, so it wouldn’t have been indexed by now - even under the most ideal circumstances (as you can read in the FAQ). The first one should have, though.
Several games I have seen in the past that had the same issues were lacking meta-information (everything that’s displayed under “More information”). If you scroll to the bottom of pretty much every page on itch you will see a link that reads “Directory”. Go through those tags and consider if any of them would apply to your games.
And once you’ve done so, upload the games. Because why would the indexing algorithm index something that isn’t there, yet…? ;)