Is there no physical version of 1.5+2.5 for Xbox? Xbox Store lists the full assortment of KH games, including 1.5+2.5, but Amazon and Walmart don't have any listings for physical copies :
Buy KINGDOM HEARTS HD 2.8 Final Chapter Prologue | Xbox
NEW Kingdom Hearts 3 Patch AND The Story So Far is Coming to Xbox – News - YouTube
Kingdom Hearts HD 2.8 Final Chapter Prologue - PlayStation 4 | PlayStation 4 | GameStop
Amazon.com: Kingdom Hearts III - Xbox One Deluxe Edition : Square Enix LLC: Video Games
Kingdom Hearts HD 1.5 + 2.5 ReMIX (XBOX ONE) cheap - Price of $20.41