The Japanese official X account for Square Enix e-Store shared sharing map themed FFXIV, Octopath Traveler 2, and Triangle Strategy merchandise to coincide with Map Day, which falls on April 19th every year in Japan.
However, all of the items listed are still available for purchase on the Japanese Square Enix e-Store.
Square Enix released this item on August 31, 2021, at 3,850 yen (~$24.90).
The Japanese Map Day falls on April 19th every year.