I reported this as well - https://itch.io/t/4012109/games-like-this-pages
The pages on Google don't seem to work properly. They exist, but they just load the same set of games no matter what game you reference, most of which match what you see on Featured Games.
There's a bug on the tracker associated with this - https://github.com/itchio/itch.io/issues/1637 but only for the links when you buy+download a game, not for the pages themselves being gone.