NHTSA Complaint #11564420 — 2021 JEEP WRANGLER

I purchased this vehicle new and the second day I drove it when I hit an expansion joint on the highway the steering wheel started to shake back and forth and the car shook badly. I took it back to the dealer, they said that there was a recall for the problem(which I found out is not true) they worked on it and it was fine until recently. I noticed the problem again with the same conditions. I have just over 36,000 miles on the vehicle now. I took it to a Jeep dealer near me since I have moved. The service manager called it a Death Wobble, which seems to be correct. They told me there was no recall, but seems to be a familiar problem with the Jeeps. They installed a new steering damper, balanced and rotated the tires, and checked the front end alignment. I seldom drive the Jeep, but last month I was going to take a trip and while driving on the interstate at approx. 72mph I crossed an expansion joint and it started to wobble so bad that I crossed into the passing lane. It didn't stop until I slowed down to around 50mph. I immediately turned around and coming back it happened again when I was only going 65mph and it through me into the passing lane again. Had to slow down to about 45mph and pull off the road. I have only put about 130 miles on it since it was fixed. I'm waiting for an appointment for the dealer to get it in and check it out. I got underneath the Jeep and checked to make sure the new part didn't come loose or was leaking oil and it seems fine. I don't understand that if this is such a common knowledge problem with the Jeeps and has been for years from my understanding, why hasn't anything been done to address it?