Final Fantasy VII: The First Soldier was among many announcements surrounding the franchise during a live stream. It was announced that the closed beta for the game will begin on June 1 and last one week until June 7 in North America on Android.
Japan will have an extra day as their closed beta runs from June 1 through June 8. The difference is that Japan’s closed beta is on both iOS and Android where North America lacks an iOS beta test.
If you are interested in taking part in the beta, registrations are still open and will close on May 28 at 8:00 PM PT (11:00 PM ET). You can sign up for the beta on the official website here: Registration for Closed Beta Test! | FINAL FANTASY VII THE FIRST SOLDIER | SQUARE ENIX (ffviifs.com)
Source: Crunchyroll