So, we’re actually gonna be doing this our selves, and its super easy.
Just create a Macro Library, these let you access macros from any blueprint.
Create this macro in one, then drop this file into the Engine/Content folder, and then boom! You can access this macro from every blueprint in every project just as if it was built into the engine itself! And why stop there, you can create all kinds of crazy super useful stuff!
I’m actually thinking about my own Standard Function and Macro libraries as they are HUGE.
Just remember you need to copy and paste them for each engine upgrade, but other than that, there’s no real hassle!
Definitely read that other answer, I go into more depth.