#Yes There Is
#Solus Level BP Tutorial
Here is my tutorial on this subject, lots of code included!
And pics!
#Summary
There is a C++ base class for level blueprints that you can extend to create your own level blueprints with their own functions and variables
you then re-parent the level BPs of any existing levels to your new level bp!
you can set a config var to automate this for all new levels