Change static model pose in `PostUpdate`

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Hi, I'm working on a System plugin in Gazebo Garden and I need to move a model in the PostUpdate callback.

I found the SetWorldPoseCmd function, but it requires a not constant Entity Component Manager and it cannot be used.

What is the correct way to set a new position for static objects?

I tried with this, but as expected it does not work:

gz::math::Pose3d newPose(mCalibX,mCalibY,mCalibZ,mCalibRoll,mCalibPitch,mCalibYaw);

gz::sim::EntityComponentManager ecm;
ecm.CopyFrom(_ecm);

mModel.SetWorldPoseCmd(ecm,newPose);