On January 21, 2022, the U.S. Department of State announced that due to limited consular operations in Moscow, Russia that multiple posts have been designated for processing certain nonimmigrant visa applications for individuals residing in Russia. Applicants for F or M student visas, as well as J academic exchange visitors (including student, professor, research scholar, short-term scholar, and specialist J-1 visa categories) and participants in U.S. government-funded exchange visitor programs, may apply at the following consular posts: Mission Kazakhstan and U.S. embassies in Belgrade or Yerevan, Armenia. This designation does not prevent Russia-based F, M, and J applicants from applying at another post where they are physically present.
See the full announcement for DOS Announces F/M/J Visa Processing Posts for Applicants in Russia