and that's of course nonsense, the more narrow mount simply makes it nescessary to calculate more precisely, canon had a 85mm f1.2 lens for their fd-mount fe...
the reason for making a 85 1.2 lens is however no other than prestige.
Sony can't make 85mm f/1.2 lens due to smaller E mount. Canon and Nikon already have 85mm f/1.2 lenses of which Nikon has the best super fast prime lens lineup.
According to the latest Sony ZV-E10 II leak, Sony will release the upcoming APS-C camera on July 10 after previous leaks suggested a May release. It will supposedly launch alongside a new kit lens to go with it. Sony will allegedly also announce a more premium 85 mm portrait lens shortly after the new compact camera.