Some schools allow test scores to be self-reported for domestic students but require international students to send official reports. So does Stanford allow scores to be self-reported for all applicants, including international students, or does this apply to US students only?
IMO, you are overthinking the process. The answer that I give below can apply to almost all the questions you have asked this week:
What does it say on their website? “We recommend that you simply self-report your highest scores in the testing section of the application. You can also have official scores sent to Stanford, but this is not required for us to review your application.”
https://admission.stanford.edu/apply/freshman/testing.html
If this policy only applied to a subset of applicants, Stanford would say so.