Same issue with 2023 Corsair Reserve, 300 miles so far. This squeaky rattle sounds like it could be coming from the glove box or the passenger door, but when I put my hand on the info screen (top right side) it seems to stop or be reduced. On the most smooth roads, it is not apparent, but our roads are rarely very smooth, so you hear it all the time, mostly above 20 MPH. My 2020 Corsair never had any rattle issues. I did not have this rattle the first few days of ownership, but it developed in the first week. Truly annoying.
Vehicle was built the last week of July 2023.