Physx and the 5% of gross revenue

I couldn’t find any references to the the Physx EULA in the repository (https://github.com/EpicGames/UnrealEngine/tree/release/Engine/Source/ThirdParty/Licenses.)

Is Physx already included in the 5% of gross revenue specified in the UE4 EULA?

What about other modules of Physx not included in the repository, would those be included too?

PhysX is included automatically in a UE4 EULA license; there is no separate license for that. There are no separate royalties - it is included in the 5% royalty to Epic. The UE4 EULA only covers PhysX provided directly from Epic in UE4. Anything would need to be licensed separately from NVIDIA.