Transform (Modify) Bone don´t work in Game

Hello there,
I have the problem that the bones of my vehicle are only modified in the editor and are apparently reset to their original values in the game.
This way worked for my character. Is there anything else to consider with vehicles?

are you sure that you changed the animation of your skeletal mesh to this animation bp?

Setup is correct and the wheels are rotating when steering.

I found an older post with the same problem. But there is no answer to the problem either.
Link: Vehicle part's bone rotation

either you have the wrong bone selected in the animation blueprint to modify, or (what i think is the problem) is the wheel handler is returning 0 everytime.

I also think that the modifyer will be overwritten, because if I change the runtime values, the arm jumps up and then jumps back to its starting position. The only question now is for me how I can bypass the wheelhandler. Is there such a thing as blend that you can use for this or how can you separate the two parts?

Now I tried this setup bet still it only works in Editor and not in Game. Any further ideas are welcome.