2020 Hyundai Tucson - P0302 Cylinder 2 Misfire - Coolant Consumption

My 2020 Tucson has 55k miles and started running rough for about 30 seconds every morning. Once it warms up, it's smooth as silk. The check engine light comes on for Cylinder 2 misfire. I noticed the coolant reservoir was almost empty last week. I topped it off and now it's low again, but I don't see any leaks on my driveway and there's no white smoke from the exhaust. I've already swapped the coil and plug from cylinder 2 to 1, but the code stays on cylinder 2.