The same way all documents somehow being found by Russian media are accredited: Not at all.
Believing in secret biolabs in Ukraine is an IQ test. The more you believe in its possibility, the lower your IQ results.
Regrets for your limited grasp of events.
You evidently missed or ignored the open testimony of US UnderSecretary, Victoria Nuland, to Senator Rubio of the USDOD sponsored labs, located in UKR and 300 others in Europe and around the world, like Wuhan. See US Senate committee hearings, 2022.