How to get a render target that can be used in the editor interface from a scene rendered from the player perspective or camera perspective

Development Rendering
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I want to get the rendered picture in the player viewport or camera viewport, and use rendertarget in the editor interface to pass it to other machines through SDI or BMD. I noticed that in the Render of FDerferredShadingRenderer (this is a rendering function), the obtained texture will be copied at the end, that is, it will be copied to the SceneTextures of ViewFamily. Can I get the RenderTarget in the editor through this SceneTextures?