You need community service. Tutoring (including refugees) is common among premed applicants, so it doesn't make you stand out (nor would STEM activities like your robotics coaching). Food distribution, shelter volunteer, job/tax preparation, transportation services, and housing rehabilitation are categories of activities you should seek. As it sounds, you look more focused towards MD/PhD tracks.
Obviously your refugee status is significant to your identity and likely purpose. You have the metrics to pick your programs, but you likely gravitate towards programs that help you build on this identity. Do some research on programs that have opportunities serving refugee populations.
Student run asylum clinics across the US directly affiliated with Physicians for Human Rights.
www.phrstudents.com