Sanctions since 2014 and 2022 have hobbled the Russian space programme, cutting it off from western technology and funding. The launch in 2019 was delayed because a landing radar that Roscosmos planned to import from the west was no longer available after 2014, Egorov said. After attempting to manufacture the radar domestically, Roscosmos determined that it was unnecessary for the mission.
(source)
Huh, turns out landing radar IS necessary.
I disagree, the impactor didn’t even get into orbit before fulfilling its mission, I doubt the radar would have even been turned on at that point