Decending Problem..........but I guess the Problem sits behind the Throttle

[Bob57]

Hi Guys. I made two very nice Ferry Flights in MSFS 2024. No freight, only 25 Passengers. Went from Toulouse to Zürich and from Toulouse to Munich. Worked nicely untill I had to decent. I was at 37.000 feet and on 43.000 feet. When the demand showed up i went dorn to lets say 20.000 and in the ohtre flight down to 10.000 according to Flightplan from Simbrief. Both times when I was approximately 40 Miles away from Airport, I was way to high. Si I had to fly manually down with some 4000 feet/min. I know that is completely wrong. But what did I do wrong before, or do I have to tweek Simbrief. Or is it due to the low Amount of weight? Thanks for constructive critism. By the way it was the A350-900.