Is the accommodations request process the same for all College Board tests?

No. Accommodations for the following exams always require SSD approval: PSAT/NMSQT or PSAT 10, SAT, AP Exams, and CLEP with remotre proctoring. These tests do not require SSD approval: PSAT 8/9 (unless required by the state), ACCUPLACER, and CLEP (in a test center).