That incident was known within hours of the shoot down. The orc pilot is now dead, apparent ‘suicide’ a month or so ago.
It doesn’t take an expert to view the photos of the left side cockpit debris, which fell relatively intact, and understand that there are both entry and exit ordinance holes the the airframe skin. The orcs definitely fired a Buk and hit the left side of the aircraft and while the hit would have been destructive, the cockpit was hit by cannon fire from one or both of the orc aircraft from right side and behind the aircraft.
There is no doubt the orcs shot it down, even the immediate aftermath when NAF arrived on the scene while significant fires were still burning, their discussion was ‘who shot this one down’ and, most poignant, “who shot the other one down and where did it land’. What ‘other one’? The reply was ‘Ukrops got this one, we got the other one, the Sukhoi, but I don’t know where the Sukhoi fell.’