How to change Collision Objects?

I realized, that after importing .obj files, the PlayerStart always shows up with a bad size.
It seems it’s caused by the player collision objects.

When checking the viewport, Player Collision, everything looks messed up.
In UE4, I was able to influence all the collision objects in the project settings → Default Shape Complexity.

For some reason UE5 doesn’t recognize the changes.
Possible, another bug?

Is anyone experiencing similar issues?