Never watched it but I heard in season 2 they made the Buran simply a straight copy of the Space Shuttle, and gave it the exact same accident as the Challenger, which would have been impossible because the Soviets didn’t use solid rocket boosters with the Buran-Energia launch system. They already had (in the real world) way more advanced liquid propellent rockets (RD-170) for that.
This is pure disrespect for actual history and really just a lack of creativity when you can’t come up with a better plotline and instead just transposed an actual American space shuttle disaster to the Soviets which you as a show writer should know is technically impossible if you even have a brief understanding of the Soviet space program.