zero? https://www.unrealengine.com/marketplace/en-US/assets?count=20&keywords=water&sortBy=relevancy&sortDir=DESC&start=0&tag=38 i guess similar content exists for different engines
i must have a dozen different pbr water shaders for unreal. Rivers, oceans, ponds... every type of water. All from different authors. as mentioned, of course you can transport the textures anywhere you want but the shader itself is always dependent on the language / engine.
I think generally it would help if you tried to explain in more detail what exactly you want achieve using what application/renderer, ideally with images/examples. If your talking about game art, I would probably start by looking for sample/existing content for which ever engine you want to use, as linked by Neox, and then…