As others are also pointing out, need-based aid for internationals has very limited funding in the US. Some colleges offer none, and others very carefully ration it out. They are what is called need aware for internationals, and will only admit high need internationals if they really want that specific international student.
To really assess your chances, it would be best to get information from someone familiar with your country, and ideally your school. At what US colleges do similar applicants get admitted despite being high need? What credentials do they usually need to make that work? I note IB is generally good for being competitive, but the lack of US entrance exams like the ACT/SAT might be a problem for some colleges. Again, it would be ideal to see if high need people with that profile from your school/country are doing well with US colleges, and if so which colleges.
As a final thought, there are a variety of private US colleges that might be very interested in using some of their limited aid budget for internationals on you, but that are not “T20s”. Sometimes internationals just prefer their non-US options, which is fine. But if you are really interested in college in the US, it can pay be to be open-minded about exactly which colleges in the US.