Nah. You do not use the grammar I am familiar with. I get what you saying, at least I think so, but it just makes little sense. If you do not add nexus or mod plus a game name, your things are bound to not come up in search. Argueing about any lack of discoverablity because of this trivial fact is rather strange.
mod and enemy spawn will show you mods for the most popular game, Minecraft. While nexus will focus on mods on nexus, it will still show the most popular modded game there, which is Skyrim I guess.
Also, if I search Enemy Respawn Resident Evil Requiem, your things do show up, including the Itch page. So I do not understand the premise of your thread.
(Try searching in a private browser window when searching with google. Fresh cookies. Google might adjust your results based on your previous searches and rank certain things higher. The first page of results is not that long. Maybe the Itch page appears on page 2 or 3 for your search terms.)