I just got into Tekken 7 speedrunning and I couldn't find an auto splitter, so I spent a couple hours learning how to make one. You still have to manually start and end the timer when you start and end the run, but at least it auto splits the chapters for you:

state("TekkenGame-Win64-Shipping") { int chapterNumber: 0x034CC540, 0x28, 0x9A4; }

split { print("Level: " + current.chapterNumber);

if (current.chapterNumber > old.chapterNumber) {
    return true;
}

}