As I read it, they don't claim it, they just "mention" it:
An enemy Ka-32 helicopter was burned at an airfield in Moscow
On the night of April 26, 2024, a multi-purpose enemy Ka-32 helicopter was destroyed at the Ostafyevo airfield of the Ministry of Defense of the Russian Federation in the city of Moscow.
The airfield belongs to the Ministry of Defense of the Russian Federation and is operated jointly with the Gazpromavia enterprise, which is part of the structure of Gazprom OJSC.
The destroyed piece of aviation equipment was used by the aggressor state in the interests of the Moscow aviation center, in particular, to support the operations of the Russian occupation army.
Glory to Ukraine!
Doesn't say they didn't (or did) have anything to do with it of course. Either way another piece of equipment that can't be used against the Ukraine.