Perhaps it the way you expressed it in English, but I don’t understand your point. Are you taking about sharpening or zooming? I can zoom using the scroll wheel of my mouse in Repair mode in Windows 10 all the way to 400%. And sharpening appears in Repair mode at 75% and above. If you post in French I will use DeepL to translate it to English so I can hopefully better understand this issue.
Oh. Ok. Now I understand. You are referring to the granularity of the scale as you zoom. In Repair mode you can zoom from 70% to 75% to 80%. It also zooms like that does that in local adjustments. In normal mode the zoom skips 75%. I agree it should zoom to 75% in all modes which is the starting point for viewing sharpening. Of course, it would be even better if the threshold for viewing sharpening was set at 50%.