If its worthy of note I have dadant hives 43 x 50 cm. Deep broad chambers and shallow supers.
My part of Alaska has a full nine month dearth (absolutely zero forage). I winter my Langstroth hives with brood boxes + two fully capped boxes of Dadant half-depth (which we in US call "Mediums"; nearly 60kg total honey). My Warres winter on brood box + two fully capped boxes (nearly 40kg total honey).
The more I read on French forums and beekeeping books, the recommended amount of honey/syrup for wintering, there, is 18kg (Warre), 20kg (Voirnot or Layens), and 25kg (Dadant or Langstroth). If you are in 12-frame Dadants, you might add one or two kilos to that weight estimate. It is better to have too much than not enough. Capped or uncapped makes little difference.
I can find no references for pollen stores for overwintering in FR, but I can in UK, US, DE, RU, and other areas. It appears you should be aiming for about 1kg pollen stores, if you are able to manipulate it. The most common way to be sure they have enough pollen is to simply add protein patties either in autumn after freeze, or in late winter/early spring before thaw.