Perhaps the list is limited to studies which meet certain criteria for accuracy and reliability. While the Russians may make a perfectly good vaccine, it is the testing and evaluation before giving it to millions of people which is vital to be certain. No one who has generated a vaccine currently being tested in humans could have proven its safety yet. That and its success will depend on the actual "testing" once millions of people receive it. Safety comes before everything.
Vaccine development studies like this are extremely data intensive. It is critical that all data collection, reporting and an extensive evaluation by experts is allowed to occur unhindered. Once you get the vaccine injected, you cannot easily change the results which occur to your immune system, if at all.