Engine failure?

I own the vehicle listed above SE. When I purchased the vehicle, it had 109,000 miles which is a lot for a vehicle that was purchased in 2021. 25 days after I drove my car off the lot, I started to experience A loss of power that would prevent my car from accelerating past 40 MPH. I had my car towed to the dealership and I was denied a new engine to be installed, if anyone is aware of the Theta engine class action lawsuit that happened in 2019. My car should have had a new engine installed. Instead, a used engine was installed, and I was told that my car did not qualify for a new engine because the number four cylinder having low compression had nothing to do with the rod bearings. I was informed by a few different people that the number four-cylinder having low compression ties to rod bearings and the short and long block. I still continue to have the same issue today of the loss of power, stalling of vehicle while driving poor fuel economy, and knocking noises from the engine. Could I be having the same issue?