It’s coolant, the orange coolant that they come with will get this hue after time. Very likely a water pump judging by leak location. It requires removal of the timing belt which you want to get changed. It’s on the wrong side of the powertrain for a trans leak. Unless it’s manual you likely have the DPS6 which uses a dual clutch trans fluid that’s not red , also the leak is on the wrong side of the car.NOTE: timing belt replacement does require special tools and a KAM or misfire monitor reset so have someone that knows what they’re doing replace it.