Sorry you are going through this too. I just received mine back today after 2 mos. They repl transmission , torque converter, hybrid module and transmission cooler due to metal shavings.At 600 miles I had the same experience. I dropped it off at the dealer October 24, 2024. As of December 1, 2024 it is still there. Toyota is waiting for the following parts:
Hybrid Module Assembly
Transmission Assembly
Torque Converter Assembly
I have wanted a Landcruiser for as long as I can remember. Not a happy camper. Waiting for Toyota to replace the vehicle or just buy it back. I have to admit I am worried about the new technology.