Hello everyone, I have a 2021 Edge St with 13,000 miles. It just developed a rattling sound underneath the car when I rev up the engine. I can be in park or driving. There is an exhaust rattle around 1900 to 2200 rpm. Very noticeable when I rev the motor a bit while in park. Especially as the motor is decelerating. Seems to happen only after the car has warmed up a few minutes and is definitely in the exhaust system. I took it to a local Ford dealer, and they were too busy to take a quick look. Trying to get some feedback before I take it in. Thanks for any help.