It was all a misunderstanding

Supreme Leader Nanobana Kinako found out the root of the problem in Minecraft and she confirmed that the Export Button has been dismantled from the Glodelania Edition in the Minecraft Commuter Line. Hence why the button disappeared from the game. For that, Supreme Leader Nanobana Kinako left 1.21.31 and 1.21.62 has been reinstated. For the Minecraft Shinkansen Line, the project has been halted and shall be continued when Minecraft Commuter Line finished, for real.