You can find your answer is this post : Feedback Wanted: Scriptable Render Pipelines page-8#post-3408481
The closest match you can find are those:
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public static event Action<Camera[ ]> beginFrameRendering;
Called when SRP rendering begins. Do things like make frame dependent geometry or similar from this callback. Called by default in HD / LW pipe. If you write a custom pipe you need to issue the call yourself. -
public static event Action beginCameraRendering;
Called when camera rendering begins (per camera). Do things like camera dependent effects (planer reflection) or similar from this callback. Called by default in HD / LW pipe. If you write a custom pipe you need to issue the call yourself.