Russia has changed the procedure of arriving.
On December 29, 2021, amendments to the Federal Law “On the Legal Status of Foreign Citizens in the Russian Federation” came into force. The new provisions establish that foreign citizens arriving in Russia for a period of more than 90 days, incl. for the purpose of studying, must undergo a medical examination, fingerprint registration and photographing.
All information (do you need to do that, how to do and when) you can find here https://istudents.hse.ru/en/newprocedures/