I am attempting to follow this document on creating Light Effects in UEFN.
The documentation mentions a BreakoutFloat02 material function node.
I could not locate such a node in UEFN, yet it does exist in the latest UE5 edition under the Engine/Content/Functions/Engine_MaterialFunctions02/Utility folder.
I copied that node from the UE5 folder into the UEFN project content folder, and it functioned as expected, I think.