Mine 3/25(68xxx) has this issue since it delivered on May. I only noticed the driver-side mirror vibration, but the passenger-side was very solid, so I back to SC they replaced the mirror.
Issue had not solved, after that I realized the whole door is vibrating when driving 80+mph.
But SC...
4 month for repairing??? In Tesla service center?
Did they give you another CyberTruck during the repairing?
Sorry this happened to you, I couldn't image that I can't drive my truck for 4 months just waiting for the repairing.