Processing Viewport texture in plugin

I’m migrating from Unity to Unreal with my post-effect plugin. In Unity I implemented callback OnRenderImage of Camera’s component to get ID3D11Texture2D prepared for rendering. In this point I can modify that texture as I wish.
Is there something similar in Unreal? How to ‘inject’ my plugin into rendering pipeline to get native rendering textures to post-process them in C++ code?

hello friend, did you find any answers ? my friend is in a similar situation, he want’s to make a custom post-processing effect for his mobile game and is looking for something like onRenderImage(src,dest)