Not that lack of incoruptibility denies sainthood, of course. The real thing is just really neat :)
Look at St John newmann in Philly... The Pine Box he was Buried was dust they did an autopsy on him in 1990’s and Changed his vestments this past January!He has a Mask because the Brass Cross from the Cofin landed on his Face for almost a Century
I wouldn’t call Bernadette incorruptible since she has a layer of wax over her face and hands to hide the effects of decay.