Evidently you have reading comprehension problems. Because the article isn’t discussing the Ukrainian troops from 2022, but the new foreign legion troops that are French troops.

France has sent its first troops officially to Ukraine. They have been deployed in support of the Ukrainian 54th Independent Mechanized Brigade in Slavyansk. The French soldiers are drawn from France’s 3rd Infantry Regiment, which is one of the main elements of France’s Foreign Legion (Légion étrangère).