Can we modify ShadowCaster2D's mesh at runtime?

This is an excellent question I can’t find an answer to. I hope someone comes along to enlighten us!

Helpful link maybe?
https://github.com/Unity-Technologies/ScriptableRenderPipeline/blob/master/com.unity.render-pipelines.universal/Runtime/2D/ShadowCaster2D.cs

More info, perhaps an answer:

EDIT:
And what I came up with: