I think it is counting 40km in Cold aspect when fired and chasing a target ? Not sure but even Wikipedia and some other sites state 30 to 40km, witch is not realistic.
For example:
R-73A, R-73E: 30 kilometres
RVV-MD − Export model of the R-74 with ±75° off-boresight. The missile has a maximum range of 40 kilometres (25 mi) with 8 kg warhead.
as for the rest I don’t know, just shared the brochures in front of the planes, some stuff don’t match up tbh
Also the source: https://youtu.be/refQ5_blRqE?si=K--RneHJVZtZ5x-J