The phrase "policy realm" refers to the area or domain in which decisions and actions related to policies are made. It describes the specific field or subject matter that policies focus on. Full definition
While he is wildly inconsistent in most policy realms, he has been persistent about his desire to impose tariffs on imports to boost struggling parts of the American economy. (vox.com)
We wanted to think, as much as possible, in terms of administrative flexibility and stay out, as much as possible, of the substantive policy realm. (educationnext.org)
My life is made up of two different worlds - one in the outdoors with horses, camping, mountain biking, snowboarding, etc. and the other in the business / policy realm with big cities, dinner parties, symphonies, and board rooms. (equestriandating.com)