School thesis
Heterodox macro is a family of critiques that asks which institutional, monetary, ecological, distributional, or power relation the mainstream frame has pushed outside the model.
Heterodox macroeconomics is unified less by one shared model than by a shared dissatisfaction with what mainstream macro often leaves out: institutions, power, money creation, unpaid work, ecological limits, and irreducible uncertainty.
Read the heterodox pages as a family resemblance. Some branches focus on money and uncertainty, others on class conflict, institutions, care, or planetary limits, but all push back on narrowing macroeconomics too quickly.