"For reasons that remain unclear, Itch has removed all NSFW games from its search index."
This is most likely due to a new EU and UK law that will restrict access to adult content until users are verified.
Viewing post in About all, and 0.3 announcement comments
that isnt the case, its "Collective Shout" pressuring payment companies like visa and mastercard into pulling out of itch and steam unless adult content is removed. For the record, Collective Shout has been abusing their influence for about ten years since they launched a campaign against GTA5 and Detroit: Become Human for their depictions of sex workers and child abuse respectfully