Legacy How do I recognize timing belt change

Hello, I’ve been driving a legacy with 2.5L engine with 132000km and don’t know if the timing belt was made, you can see if the timing belt has already dropped 130000 or only 25000? Have the cover removed to look at but I know too little to determine if that was done or not. Does anyone have a tip? the straps and the timing belt disc was once marked with a pen is that a sign?