Thanks for the clarifying question! I'm looking for theory.
Boal is a great place to start. Process, procedure, theory.
the Theater of the Opresaed reading list should get you lots of what you need. And if you reach out to them- they have great resources. https://www.tonyc.nyc/resources
TONY supported students at my old high school in making a social justice piece that drew attention to gun violence in schools. The students ended up performing it in Times Square during the big walkout. It was really helpful to have a support org outside the school that students could work with to develop their ideas.
I can point you in other directions. But this is a great place to start.