I definitely know some don’t but which colleges do if any? (My list Georgetown, American, GW, UNC, BC, George Mason, Brown, Vanderbilt, Emory, Elon, Clemson, William & Mary)
Adcoms see your self reported scores on the Common App but that report isn’t official as it is self reported. If your school includes AP scores on the transcript Adcoms will see them on your transcript. It might well be a waste of money but you can send an official score report to each school but it might wind up in the registrars office and not the admissions office so if you do submit scores double check that they find their way to your admissions files.
Personally I do think schools known for holistic admissions notice scores as they are another data point for consideration. But since not all high school students have equal access to AP/IB classes, adcoms don’t hold a lack of scores against an applicant if the student didn’t have opportunity to take such classes. An excellent grade in an AP class followed by a 4 or 5 on the AP test is of course ideal as it show mastery of the subject. I think most people still recommend reporting a 3 as well since technically it means you passed the exam. Some people feel reporting a 1 or a 2 is not a good idea if it can be avoided.
Regarding which schools in particular officially consider AP scores as, you have to dig deep into each website to see if AP/IB is mentioned in their standardized testing policy. Colorado College, for example, will consider certain AP test scores in lieu of SAT/ACT subsections. It is part of their flexible testing policy and the parameters/guidelines are available on the CC website. Most schools do not state that they officially consider AP scores for admissions.
If you are applying to a test optional school and are not submitting any standardized tests I would think AP scores would matter to admissions as the scores would reflect performance that can easily be compared to many others taking the same test. But that’s just my two cents.