This conspiracy got started because records were uncovered from Ukraine biolabs looking for samples of synovial fluid and specifying it had to be taken from ONLY those genetically Russian and exclude Ukrainians, making people think they were working on a race specific bioweapon. But it turns out that’s not the case, they required Russian synovial fluid because they wanted to compare with other samples they had collected previously that had come from Russian donors so wanted consistency in comparing the samples.
Why deal with boring old facts when you can make a dramatic conspiracy theory that people will repeat over and over. Things just get crazier and crazier.