Update 7/11: Square Enix has said that there are no plans for Final Fantasy VII Remake to release on any console aside from PS4.
In a statement to IGN, Square Enix said “As previously announced, Final Fantasy VII Remake will be released for the PlayStation 4 on March 3rd 2020. We have no plans for other platforms.”
The statement seems to suggest, without going as far as to use the exact phrasing, that Final Fantasy VII Remake is a PS4 exclusive. Such a situation would mean that the Xbox One release date mistakenly shown by the Xbox Germany Facebook account is a complete mistake, rather than a mishandled date announcement.
Original story: A social media video which contained a release date for Final Fantasy 7 Remake on Xbox One is an “internal mistake”, according to Microsoft.
Source: IGN.com Final Fantasy 7 Remake: Square Enix Has "No Plans" For Xbox Release