Not really. The only method in FFluidSurfaceSceneProxy that really needs updating is DrawDynamicElements and that only needs to be changed to GetDynamicMeshElements and changed to use the Collector instead of drawing directly and most other changes are just adding RHICmdList to certain calls to RHI.
Other than that I don’t see being a very difficult task. I could probably give it a go over the weekend, I still have the source lying around here somewhere.