Is there a material node in Unreal Engine that is the equivalent to the anisotropic node in Blender’s Cycles rendering engine?
https://docs.blender.org/manual/en/dev/render/cycles/nodes/types/shaders/anisotropic.html
No, but there is experimental material setup that uses TemporalAA dither to simulate similar effect. You can find it in ContentExamples project, map Material_Experimental.
“Hair” shading model also uses some kind of anisotropic specularity, so maybe it would be interesting for you also.