My Model Y was delivered in June so assembly was probably completed after the factory shutdown earlier this past spring. The only post delivery issue I had with my Model Y, one that could not be ignored or delayed, was that my Model Y started leaking AC compressor oil (this lubricant is fluorescent yellow btw, like a yellow tennis ball, the compressor oil even glows under a UV black light.) This repair required a Tesla Mobile Service appointment followed by Tesla requesting that I stop driving the Model Y and have the Model Y towed on a flat bed to the Service Center. The repair, including waiting for parts, took over a week.
I had taken photos of the front compartment after the mobile service technician removed the shroud and the front storage bin so I would have a photo record of what is underneath the shroud and the storage bin. As delivered from the factory my Model Y's AC compressor did not have the acoustic cover installed. Now at the time I was battling a leaking AC compressor so it was kind of self defeating to ask that the Service Center install the acoustic cover on the compressor until I was certain that the leak had been fixed. Honestly, I don't know if the Service Center installed the acoustic cover as part of the repair to my Model Y. Does it sound different, quieter now? Maybe, I'm not really sure. There were a few times this summer during the warmest weather, before the leak was fixed, when the HVAC system sounded like a jet turbine engine spinning up when I lowered the temperature setting. After the repair, the HVAC seems to be quieter. The next time my Model Y needs service I may inquire about the acoustic cover.
There is an existing service bulletin regarding the AC compressor acoustic cover but the Service Center is not going to install the cover unless the customer complains that the AC compressor is noisy. The service center may possibly install the acoustic cover as part of repairing the HVAC compressor and compressor lines for a separate issue.