Georgetown allows applying test optional: “Students who are not able to submit scores from either test due to the COVID-19 pandemic are welcome to apply for admission to the Class of 2026 without the tests.” This is worded differently than the direction for Class of 2025, which said if you were able to test you can’t apply test optional (no score choice). 
CMU allows students to apply test optional, even if they took tests. I believe what you heard from admissions…however nowhere on their website do they say an applicant has to submit all tests if they want to apply with tests: https://www.cmu.edu/admission/admission/standardized-testing
This sentence is particularly curious if they want all tests: “Should students present tests taken two or more years in advance of their first-year experience, we’d take the timing of the test results into consideration.” That makes it sound like there is in fact score choice.