FYI there is an issue in MSFS2024 where when using any simrate other than one the time in the sim doesn't change. Only the groundspeed of the aircraft changes. Because of this the fuel burn also stays at 1x no matter what simrate you choose. This has made time acceleration essentially impossible in the sim currently. This is why you are landing with so much fuel. While 6 hours may "pass" at 4x only 90 minutes of fuel burn will have happened in that time. The microsoft devs need to fix their simrate issue first.