I was messing with the PS4 files and turns out that the PS4 version of Tekken 7 has a stage variation called stg81 which is an unused version of Devil’s Pit infinite stage

Anyway I took the stage files from there and replaced Infinite Azure with Devil’s Pit infinite map.

Here’s the download link: https://mega.nz/#!WplT1IqY!_Lo7aZT-x85E9mO_Hk5YJQuwoHDKFpJSA0ZylaTXUiI

Extract the .pak to your ~mods folder, usually located at: steamapps\common\TEKKEN 7\TekkenGame\Content\Paks