To apply for USMLE your medical college should be listed in FAIMER -IMED ( International medical education Directory) .
This is the link of the directorysearch if your college is listed in this directory.
If even one person from your college has done USMLE then it will be listed.
If your college is recognized by the medical body of your parent country then it will be listed.
Even in case it is not listed due to some issue and your college is recognized by parent government medical council then you can write a mail to ECFMG regarding this issue.They will send you a few documents to be sent back by your medical college to get it listed on IMED.
Once your college is listed you can apply for USMLE.
Hope this helped! Good luck 🙂