The supplier replied to me that, according to the manufacturer in Switzerland, only the following model is compatible with the Apple SM-R800NZSAAUT, but unfortunately we do not have it in our range.

For the European variants such as the SM-R800NZSAATO - Samsung Galaxy Watch version UE (46mm, Acier inoxydable) or the SM-R805FZSASEB https://www.galaxus.ch/fr/s1/product/samsung-galaxy-watch-eu-version-46mm-acier-inoxydable-4g-montres-de-sport-smartwatches-13502164 , we cannot 100% guarantee that this option will work. Sorry.